//
//  bttViewController.m
//  Runtime
//
//  Created by 為童沉淪 on 2022/4/12.
//

#import "ViewController.h"
#import <objc/runtime.h>
#import <objc/message.h>
#import <dlfcn.h> /// 動態連結庫標頭檔案
#import <mach-o/ldsyms.h> ///核心動態系統庫標頭檔案

@interface ViewController ()<UITableViewDelegate>
{
    NSString 
 
*_runtime1;
    __weak id _bttID;
    
}
@property (nonatomic ,copy) NSString *logic;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
}


#pragma mark - 解除IMP與Block關聯
- (void)btt_imp_removeBlock {
    //引數:IMP
    //返回:BOOL
    BOOL result = imp_removeBlock(class_getMethodImplementation(self.class
 
, NSSelectorFromString(@"btt_method")));
    NSLog(@"btt_imp_removeBlock:%d",result);
}

#pragma mark - 通過IMP獲取Block
- (void)btt_imp_getBlock {
    void (^blcok) (NSString *) = ^(NSString *str) {
        NSLog(@"btt_imp_implementationWithBlock:%@",str);
    };
    //引數:IMP
    //返回:block
    void (^result) (NSString *) = imp_getBlock(imp_implementationWithBlock(blcok));
    result(
 
@"hello word");
}

#pragma mark - 通過block獲取一個方法的實現
- (void)btt_imp_implementationWithBlock {
    void (^blcok) (NSString *) = ^(NSString *str) {
        NSLog(@"btt_imp_implementationWithBlock");
    };
    //引數:block
    //返回:IMP
    IMP result = imp_implementationWithBlock(blcok);
    result();
}

#pragma mark - 設定突變處理函式
- (void)btt_objc_setEnumerationMutationHandler {
    //引數:函式指標
    objc_setEnumerationMutationHandler(enumerationMutationHandler);
}
void enumerationMutationHandler(id obj) {
    NSLog(@"enumerationMutationHandler");
}

#pragma mark - 檢測到突變時,編譯器將插入次函式 並且呼叫objc_setEnumerationMutationHandler設定的回撥函式,如果沒有設定,則會崩潰
- (void)btt_objc_enumerationMutation {
    //引數:id
    objc_enumerationMutation(self);
}

#pragma mark - 獲取屬性的屬性列表
- (void)btt_property_copyAttributeList {
    objc_property_t t = class_getProperty(self.class, [@"logic" UTF8String]);
    unsigned int count = 0;
    //引數:1.objc_property_t 2.unsigned int *
    //返回:屬性的屬性列表
    objc_property_attribute_t *result = property_copyAttributeList(t, &count);
    for (int i = 0; i < count; i ++) {
        objc_property_attribute_t t = result[i];
        NSLog(@"btt_property_copyAttributeList:%@",[NSString stringWithUTF8String:t.name]);
    }
    free(result);
}

#pragma mark - 獲取屬性的指定屬性的值
- (void)btt_property_copyAttributeValue {
    objc_property_t t = class_getProperty(self.class, [@"logic" UTF8String]);
    //引數:1.objc_property_t 2.屬性的屬性
    //返回:屬性的屬性的值
    char *result = property_copyAttributeValue(t, [@"T" UTF8String]);
    NSLog(@"btt_property_copyAttributeValue:%@",[NSString stringWithUTF8String:result]);
}

#pragma mark - 獲取屬性的屬性
- (void)btt_property_getAttributes {
    objc_property_t t = class_getProperty(self.class, [@"logic" UTF8String]);
    //引數:objc_property_t
    //返回:屬性的屬性
    const char *result = property_getAttributes(t);
    NSLog(@"btt_property_getAttributes:%@",[NSString stringWithUTF8String:result]);
}

#pragma mark - 獲取屬性的名稱
- (void)btt_property_getName {
    objc_property_t t = class_getProperty(self.class, [@"logic" UTF8String]);
    //引數:objc_property_t
    //返回:屬性的名稱
    const char *result = property_getName(t);
    NSLog(@"btt_property_getName:%@",[NSString stringWithUTF8String:result]);
}

#pragma mark - 判斷一個協議是否遵循另一個協議
- (void)btt_protocol_conformsToProtocol {
    Protocol *pro1 = objc_getProtocol([@"UITableViewDelegate" UTF8String]);
    Protocol *pro2 = objc_getProtocol([@"UIScrollViewDelegate" UTF8String]);
    //引數:Protocol
    //返回:BOOL
    BOOL result = protocol_conformsToProtocol(pro1, pro2);
    NSLog(@"btt_protocol_conformsToProtocol:%d",result);
}

#pragma mark - 獲取協議中採用的協議列表
- (void)btt_protocol_copyProtocolList {
    Protocol *pro = objc_getProtocol([@"UITableViewDelegate" UTF8String]);
    unsigned int count = 0;
    //引數:1.Protocol 2.unsigned int *
    //返回:協議列表
    Protocol __unsafe_unretained **result = protocol_copyProtocolList(pro, &count);
    for (int i = 0; i < count; i ++) {
        Protocol *p = result[i];
        NSLog(@"btt_protocol_copyProtocolList:%@",p);
    }
    free(result);
}

#pragma mark - 獲取協議中指定的屬性
- (void)btt_protocol_getProperty {
    Protocol *pro = objc_getProtocol([@"UITableViewDelegate" UTF8String]);
    //引數:1.Protocol 2.屬性名稱 3.是否為必須方法 4.是否為例項方法
    objc_property_t result = protocol_getProperty(pro, [@"" UTF8String], YES, YES);
    NSLog(@"btt_protocol_getProperty:%p",result);
}

#pragma mark - 獲取協議的屬性列表
- (void)btt_protocol_copyPropertyList {
    Protocol *pro = objc_getProtocol([@"UITableViewDelegate" UTF8String]);
    unsigned int count = 0;
    //引數:1.Protocol 2.unsigned int *
    //返回:協議的屬性列表
    objc_property_t *result = protocol_copyPropertyList(pro, &count);
    for (int i = 0; i < count; i ++) {
        objc_property_t t = result[i];
        NSLog(@"btt_protocol_copyPropertyList:%p",t);
        
    }
}

#pragma mark - 獲取協議中指定方法的描述結構體
- (void)btt_protocol_getMethodDescription {
    Protocol *pro = objc_getProtocol([@"UITableViewDelegate" UTF8String]);
    //引數:1.Protocol 2.SEL 3.是否為必須方法 4.是否為例項方法
    struct objc_method_description result = protocol_getMethodDescription(pro, NSSelectorFromString(@"tableView:willDisplayCell:forRowAtIndexPath:"), NO, YES);
    NSLog(@"btt_protocol_getMethodDescription:%p",result.name);
}

#pragma mark - 獲取滿足條件的協議的方法列表
- (void)btt_protocol_copyMethodDescriptionList {
    Protocol *pro = objc_getProtocol([@"UITableViewDelegate" UTF8String]);
    unsigned int count = 0;
    //引數:1.Protocol 2.是否為必須方法 3.是否為例項方法 4.unsigned int *
    struct objc_method_description *result = protocol_copyMethodDescriptionList(pro, NO, YES, &count);
    for (int i = 0; i < count; i ++) {
        struct objc_method_description des = result[i];
        NSLog(@"btt_protocol_copyMethodDescriptionList:%p",des.name);
    }
}

#pragma mark - 判斷倆個協議是否相等
- (void)btt_protocol_isEqual {
    Protocol *pro1 = objc_getProtocol([@"UITableViewDelegate" UTF8String]);
    Protocol *pro2 = objc_getProtocol([@"UITableViewDataSource" UTF8String]);
    //引數:Protocol
    //返回:BOOL
    BOOL result = protocol_isEqual(pro1, pro2);
    NSLog(@"btt_protocol_isEqual:%d",result);
}

#pragma mark - 獲取協議的名稱
- (void)btt_protocol_getName {
    Protocol *pro = objc_getProtocol([@"UITableViewDelegate" UTF8String]);
    //引數:協議Protocol
    //返回:協議名稱
    const char *result = protocol_getName(pro);
    NSLog(@"btt_protocol_getName:%@",[NSString stringWithUTF8String:result]);
}

#pragma mark - 向協議中新增屬性
- (void)btt_protocol_addProperty {
    Protocol *pro = objc_allocateProtocol([@"LGProtocol" UTF8String]);
    objc_property_attribute_t type = { "T", "@\"NSString\"" };
    objc_property_attribute_t ownership = { "C", "" }; // C = copy
    objc_property_attribute_t backingivar  = { "V", "_logic" };
    objc_property_attribute_t attrs[] = { type, ownership, backingivar };
    //引數:1.協議Protocol 2.屬性的名稱 3.屬性的屬性 4.屬性的屬性的個數 5.是否為協議的必須方法 6.填YES
    protocol_addProperty(pro, [@"logic" UTF8String], attrs, 3, YES, YES);
}

#pragma mark - 向協議中新增協議
- (void)btt_protocol_addProtocol {
    Protocol *pro1 = objc_getProtocol([@"UITableViewDelegate" UTF8String]);
    Protocol *pro2 = objc_allocateProtocol([@"LGProtocol" UTF8String]);
    //引數:1.要新增到的協議 2.要新增的協議
    protocol_addProtocol(pro1, pro2);
}

#pragma mark - 向協議新增方法
- (void)btt_protocol_addMethodDescription {
    Protocol *pro = objc_getProtocol([@"UITableViewDelegate" UTF8String]);
    //引數:1.協議Protocol 2.SEL 3.方法名稱 4.是否為協議必須方法 5.是否為例項方法
    protocol_addMethodDescription(pro, NSSelectorFromString(@"btt_method"), [@"lgProtocolMethod" UTF8String], YES, YES);
}

#pragma mark - 註冊協議
- (void)btt_objc_registerProtocol {
    Protocol *result = objc_allocateProtocol([@"LGProtocol" UTF8String]);
    //引數:協議Protocol
    objc_registerProtocol(result);
}

#pragma mark - 建立協議
- (void)btt_objc_allocateProtocol {
    //引數:協議的名稱
    //返回:協議
    Protocol *result = objc_allocateProtocol([@"LGProtocol" UTF8String]);
    NSLog(@"btt_objc_allocateProtocol:%@",result);
}

#pragma mark - 獲取所有的協議列表
- (void)btt_objc_copyProtocolList {
    unsigned int count = 0;
    //引數:unsigned int *
    //返回:所有的協議列表
    Protocol __unsafe_unretained **result = objc_copyProtocolList(&count);
    for (int i = 0; i < count; i ++) {
        Protocol *pro = result[i];
        NSLog(@"btt_objc_copyProtocolList:%@",pro);
    }
}

#pragma mark - 獲取指定的協議
- (void)btt_objc_getProtocol {
    //引數:協議名稱
    //返回:協議
    Protocol *result = objc_getProtocol([@"UITableViewDelegate" UTF8String]);
    NSLog(@"btt_objc_getProtocol:%@",result);
}

#pragma mark - 判斷倆個選擇器是否相等
- (void)btt_sel_isEqual {
    SEL sel1 = NSSelectorFromString(@"btt_method1");
    SEL sel2 = NSSelectorFromString(@"btt_method2");
    //引數:SEL
    //返回:BOOL
    BOOL result = sel_isEqual(sel1, sel2);
    NSLog(@"btt_sel_isEqual:%d",result);
}

#pragma mark - 註冊方法
- (void)btt_sel_getUid {
    //引數:const char *
    //返回:SEL
    SEL result = sel_getUid([@"lglglg" UTF8String]);
    NSLog(@"sel_getUid:%p",result);
}

#pragma mark - 註冊方法
- (void)btt_sel_registerName {
    //引數:const char *
    //返回:SEL
    SEL result = sel_registerName([@"lglglg" UTF8String]);
    NSLog(@"btt_sel_registerName:%p",result);
}

#pragma mark - 獲取方法的名稱
- (void)btt_sel_getName {
    SEL sel = NSSelectorFromString(@"btt_method");
    //引數:SEL
    //返回:方法的名稱
    const char *result = sel_getName(sel);
    NSLog(@"btt_sel_getName:%@",[NSString stringWithUTF8String:result]);
}

#pragma mark - 獲取指定庫或框架中的所有類的名稱
- (void)btt_objc_copyClassNamesForImage {
    unsigned int outCount = 0;
    Dl_info info;
    dladdr(&_mh_execute_header, &info);
    //引數:1.庫或者框架 2.unsigned int *
    //返回:指定庫或框架中的所有類的名稱
    const char **result = objc_copyClassNamesForImage(info.dli_fname, &outCount);
    for (int i = 0; i < outCount; i ++) {
        const char *c = result[i];
        NSLog(@"btt_objc_copyClassNamesForImage:%@",[NSString stringWithUTF8String:c]);
    }
}

#pragma mark - 獲取類源自的動態庫的名稱
- (void)btt_class_getImageName {
    //引數:類Class
    //返回:源自的動態庫的名稱
    const char *result = class_getImageName(self.class);
    NSLog(@"btt_class_getImageName:%@",[NSString stringWithUTF8String:result]);
}

#pragma mark - 獲取所有的objc框架和動態庫
- (void)btt_objc_copyImageNames {
    unsigned int a = 0;
    //引數:unsigned int *
    //返回:C字串陣列
    const char **result = objc_copyImageNames(&a);
    for (int i = 0; i < a; i ++) {
        const char *c = result[i];
        NSLog(@"btt_objc_copyImageNames:%@",[NSString stringWithUTF8String:c]);
    }
}

#pragma mark - 交換倆種方法的實現
- (void)btt_method_exchangeImplementations {
    Method method1 = class_getInstanceMethod(self.class, @selector(btt_method1));
    Method method2 = class_getInstanceMethod(self.class, @selector(btt_method2));
    //引數:Method
    method_exchangeImplementations(method1, method2);
    [self btt_method1];
    [self btt_method2];
}

#pragma mark - 設定方法的實現
- (void)btt_method_setImplementation {
    Method method = class_getInstanceMethod(self.class, @selector(btt_method));
    IMP imp = class_getMethodImplementation(self.class, @selector(btt_method1));
    //引數:1.Method 2.IMP
    //返回:方法的先前實現
    IMP result = method_setImplementation(method, imp);
    NSLog(@"btt_method_setImplementation:%p",result);
    result();
    [self btt_method];
}

#pragma mark - 獲取方法的結構體
- (void)btt_method_getDescription {
    Method method = class_getInstanceMethod(self.class, @selector(btt_method));
    //引數:Method
    //返回:方法的結構體
    struct objc_method_description *result = method_getDescription(method);
    NSLog(@"btt_method_getDescription:%p",result);
}

#pragma mark - 獲取單個引數的型別
- (void)btt_method_getArgumentType {
    Method method = class_getInstanceMethod(self.class, @selector(btt_method));
    char result[10];
    //引數:1.Method 2.引數索引 3.char陣列 4.char陣列的長度
    method_getArgumentType(method, 0, result, sizeof(result));
    NSLog(@"btt_method_getArgumentType:%@",[NSString stringWithUTF8String:result]);
}

#pragma mark - 獲取方法引數的數量
- (void)btt_method_getNumberOfArguments {
    Method method = class_getInstanceMethod(self.class, @selector(btt_method));
    //引數:Method
    //返回:引數的個數
    unsigned int result = method_getNumberOfArguments(method);
    NSLog(@"btt_method_getNumberOfArguments:%d",result);
}

#pragma mark - 獲取方法的返回值型別
- (void)btt_method_getReturnType {
    Method method = class_getInstanceMethod(self.class, @selector(btt_method));
    //引數:1.Method 2.char陣列 3.char陣列的長度
    char result[10];
    method_getReturnType(method,result,sizeof(result));
    NSLog(@"btt_method_getReturnType:%@",[NSString stringWithUTF8String:result]);
}

#pragma mark - 獲取方法的單個引數型別
- (void)btt_method_copyArgumentType {
    Method method = class_getInstanceMethod(self.class, @selector(btt_method));
    //引數:1.Method 2.unsigned int引數索引
    //返回:引數型別
    char *result = method_copyArgumentType(method, 0);
    NSLog(@"btt_method_copyReturnType:%@",[NSString stringWithUTF8String:result]);
    free(result);
}

#pragma mark - 獲取方法的返回值型別
- (void)btt_method_copyReturnType {
    Method method = class_getInstanceMethod(self.class, @selector(btt_method));
    //引數:Method
    //返回:方法的返回值型別
    char *result = method_copyReturnType(method);
    NSLog(@"btt_method_copyReturnType:%@",[NSString stringWithUTF8String:result]);
}

#pragma mark - 獲取描述方法的引數和返回值型別的字串
- (void)btt_method_getTypeEncoding {
    Method method = class_getInstanceMethod(self.class, @selector(btt_method));
    //引數:Method
    //返回:描述方法的引數和返回值型別的字串
    const char *result = method_getTypeEncoding(method);
    NSLog(@"btt_method_getTypeEncoding:%@",[NSString stringWithUTF8String:result]);
}

#pragma mark - 獲取方法的實現
- (void)btt_method_getImplementation {
    Method method = class_getInstanceMethod(self.class, @selector(btt_method));
    //引數:Mothod
    //返回:IMP指標
    IMP result = method_getImplementation(method);
    NSLog(@"btt_method_getImplementation:%p",result);
}

#pragma mark - 獲取方法名稱
- (void)btt_method_getName {
    Method method = class_getInstanceMethod(self.class, @selector(btt_method));
    //引數:Mothod
    //返回:SEL指標
    SEL result = method_getName(method);
    NSLog(@"btt_method_getName:%p",result);
}

#pragma mark - 刪除關聯
- (void)btt_objc_removeAssociatedObjects {
    //引數:關聯的物件
    objc_removeAssociatedObjects(self);
}
#pragma mark - 獲取關聯的值
- (void)btt_objc_getAssociatedObject {
    //引數:1.關聯的物件 2.key
    //返回:關聯的值
    id result = objc_getAssociatedObject(self, [@"LGKey" UTF8String]);
    NSLog(@"btt_objc_getAssociatedObject:%@",result);
}
#pragma mark - 設定關聯
- (void)btt_objc_setAssociatedObject {
    /**
     policy：關聯策略。有五種關聯策略。
     OBJC_ASSOCIATION_ASSIGN 等價於 @property(assign)。
     OBJC_ASSOCIATION_RETAIN_NONATOMIC等價於 @property(strong, nonatomic)。
     OBJC_ASSOCIATION_COPY_NONATOMIC等價於@property(copy, nonatomic)。
     OBJC_ASSOCIATION_RETAIN等價於@property(strong,atomic)。
     OBJC_ASSOCIATION_COPY等價於@property(copy, atomic)。
    */
    //引數:1.要關聯的物件 2.全域性唯一KEY 3.關聯的obj 4.關聯策略policy
    objc_setAssociatedObject(self, [@"LGKey" UTF8String], @"123456", OBJC_ASSOCIATION_COPY_NONATOMIC);
}

#pragma mark - 獲取例項變數的偏移量
- (void)btt_ivar_getOffset {
    Ivar ivar = class_getInstanceVariable(self.class, [@"_logic" UTF8String]);
    //引數:Ivar
    //返回:例項變數的型別
    ptrdiff_t result = ivar_getOffset(ivar);
    NSLog(@"btt_ivar_getOffset:%td",result);
}

#pragma mark - 獲取例項變數的型別
- (void)btt_ivar_getTypeEncoding {
    Ivar ivar = class_getInstanceVariable(self.class, [@"_logic" UTF8String]);
    //引數:Ivar
    //返回:例項變數的型別
    const char *result = ivar_getTypeEncoding(ivar);
    NSLog(@"btt_ivar_getTypeEncoding:%@",[NSString stringWithUTF8String:result]);
}

#pragma mark - 獲取例項變數名稱
- (void)btt_ivar_getName {
    Ivar ivar = class_getInstanceVariable(self.class, [@"_logic" UTF8String]);
    //引數:Ivar
    //返回:例項變數的名稱
    const char *result = ivar_getName(ivar);
    NSLog(@"btt_ivar_getName:%@",[NSString stringWithUTF8String:result]);
}

#pragma mark - 獲取指定類的元類定義
- (void)btt_objc_getMetaClass {
    //引數:類的名稱
    //返回:類Class
    id result = objc_getMetaClass([@"ViewController" UTF8String]);
    NSLog(@"objc_getMetaClass:%@",result);
}

#pragma mark - 獲取指定類的類定義
- (void)btt_objc_getRequiredClass {
    //引數:類的名稱
    //返回:類Class
    Class result = objc_getRequiredClass([@"ViewController" UTF8String]);
    NSLog(@"btt_objc_getRequiredClass:%@",result);
}

#pragma mark - 獲取指定類的類定義
- (void)btt_objc_getClass {
    //引數:類的名稱
    //返回:類Class
    Class result = objc_getClass([@"ViewController" UTF8String]);
    NSLog(@"btt_objc_getClass:%@",result);
}

#pragma mark - 獲取指定類的類定義
- (void)btt_objc_lookUpClass {
    //引數:類的名稱
    //返回:類Class
    Class result = objc_lookUpClass([@"ViewController" UTF8String]);
    NSLog(@"btt_objc_lookUpClass:%@",result);
}

#pragma mark - 獲取已註冊的類
- (void)btt_objc_copyClassList {
    unsigned int outCount;
    //引數:整數指標
    //返回:已註冊的類的指標列表
    Class *result = objc_copyClassList(&outCount);
    for (int i = 0; i < outCount; i++) {
        NSLog(@"btt_objc_copyClassList:%s", class_getName(result[i]));
    }
    free(result);
}

#pragma mark - 獲取已註冊的類的數量
- (void)btt_objc_getClassList {
    //引數:1.傳NUll獲取當前註冊的所有類 2.傳0
    //返回:所有註冊類的總數
    int result = objc_getClassList(NULL, 0);
    NSLog(@"btt_objc_getClassList:%d",result);
}

#pragma mark - 設定物件的類
- (void)btt_object_setClass {
    //引數:1.物件obj 2.類Class
    //返回:類Class
    Class result = object_setClass(self, [UIViewController class]);
    NSLog(@"btt_object_setClass:%@",result);
}

#pragma mark - 獲取物件的類物件
- (void)btt_object_getClass {
    //引數:物件obj
    //返回:類Class
    Class result = object_getClass(self);
    NSLog(@"btt_object_getClass:%@",result);
}

#pragma mark - 獲取物件的類名
- (void)btt_object_getClassName {
    //引數:物件obj
    //返回:物件的類名
    const char*result = object_getClassName(self);
    NSLog(@"btt_object_getClassName:%@",[NSString stringWithUTF8String:result]);
}

#pragma mark - 設定物件中例項變數的值
- (void)btt_object_setIvar {
    Ivar ivar = class_getInstanceVariable(self.class, [@"_logic" UTF8String]);
    //引數:1.物件obj 2.例項變數ivar 3.例項變數的值id
    object_setIvar(self, ivar, @"123456");
}

#pragma mark - 獲取物件中例項變數的值
- (void)btt_object_getIvar {
    Ivar ivar = class_getInstanceVariable(self.class, [@"_logic" UTF8String]);
    //引數:1.物件obj 2.例項變數ivar
    //返回:id
    NSString *result = object_getIvar(self, ivar);
    NSLog(@"btt_object_getIvar:%@",result);
}
#pragma mark - 例項化類
- (void)btt_class_createInstance {
    //引數:1.類Class 2.額外分配的位元組數
    //返回:類的例項
    NSObject *result = class_createInstance([NSObject class], 0);
    NSLog(@"btt_class_createInstance:%@",result);
}

#pragma mark - 註冊使用類
- (void)btt_objc_registerClassPair {
    Class result = objc_allocateClassPair([NSObject class], [@"NewClass" UTF8String], 0);
    //引數:類Class
    objc_registerClassPair(result);
}

#pragma mark - 銷燬一個類
- (void)btt_objc_disposeClassPair {
    //引數:類Class
    Class result = objc_allocateClassPair([NSObject class], [@"NewClass" UTF8String], 0);
    objc_disposeClassPair(result);
}

#pragma mark - 新增一個新類
- (void)btt_objc_allocateClassPair {
    //引數:1.新新增類的父類 2.新類的名稱 3.填0
    //返回:新類
    Class result = objc_allocateClassPair([NSObject class], [@"NewClass" UTF8String], 0);
    NSLog(@"btt_objc_allocateClassPair:%p",result);
}

#pragma mark - 設定類的版本號
- (void)btt_class_setVersion {
    //引數:1.類Class 2.int
    class_setVersion(self.class, 100);
}

#pragma mark - 獲取類的版本號
- (void)btt_class_getVersion {
    //引數:類Class
    //返回:版本號
    int result = class_getVersion(self.class);
    NSLog(@"btt_class_getVersion:%d",result);
}

#pragma mark - 獲取協議列表
- (void)btt_class_copyProtocolList {
    //入參:1、類Class 2、unsigned int 型別
    //返回:整個類的遵循的協議
    unsigned int copyProtocolListCount = 0;
    Protocol * __unsafe_unretained *protocals = class_copyProtocolList([self class], &copyProtocolListCount);
    for (NSInteger i = 0; i < copyProtocolListCount; i++) {
        Protocol * protocal = protocals[i];
        const char *name = protocol_getName(protocal);
        NSLog(@"btt_class_copyProtocolList:%s",name);
    }
    free(protocals);//釋放
}

#pragma mark - 判斷是否遵循某個協議
- (void)btt_class_conformsToProtocol {
    //引數:1.類Class 2.協議
    //返回:BOOL
    BOOL result = class_conformsToProtocol(self.class, NSProtocolFromString(@"UITableViewDelegate"));
    NSLog(@"btt_class_conformsToProtocol:%d",result);
}

#pragma mark - 替換類的屬性
- (void)btt_class_replaceProperty {
    objc_property_attribute_t type = { "T", "@\"NSString\"" };
    objc_property_attribute_t ownership = { "C", "" }; // C = copy
    objc_property_attribute_t backingivar  = { "V", "_attribute0" };
    objc_property_attribute_t attrs[] = { type, ownership, backingivar };
    //引數:1.類Class 2.屬性名稱 3.屬性的相關屬性 4.屬性的相關屬性的個數
    class_replaceProperty(self.class, [@"logic" UTF8String], attrs, 3);
}

#pragma mark - 為類新增屬性
//get方法
NSString *attribute0Getter(id classInstance, SEL _cmd) {
    Ivar ivar = class_getInstanceVariable([classInstance class], "_attribute0");//獲取變數,如果沒獲取到說明不存在
    return object_getIvar(classInstance, ivar);
}
//set方法
void attribute0Setter(id classInstance, SEL _cmd, NSString *newName) {
    Ivar ivar = class_getInstanceVariable([classInstance class], "_attribute0");//獲取變數,如果沒獲取到說明不存在
    id oldName = object_getIvar(classInstance, ivar);
    if (oldName != newName) object_setIvar(classInstance, ivar, [newName copy]);
}
- (void)btt_class_addProperty {
    objc_property_attribute_t type = { "T", "@\"NSString\"" };
    objc_property_attribute_t ownership = { "C", "" }; // C = copy
    objc_property_attribute_t backingivar  = { "V", "_attribute0" };
    objc_property_attribute_t attrs[] = { type, ownership, backingivar };
    //引數:1.類Class 2.屬性陣列 3.屬性個數
    //返回值:BOOL
    BOOL suc0 = class_addProperty(self.class, "_attribute0", attrs, 3);
    
    SEL getter = NSSelectorFromString(@"attribute0");
    SEL setter = NSSelectorFromString(@"setAttribute0:");
    BOOL suc1 = class_addMethod(self.class, getter, (IMP)attribute0Getter, "@@:");
    BOOL suc2 = class_addMethod(self.class, setter, (IMP)attribute0Setter, "v@:@");
    NSLog(@"btt_class_addProperty:class_addProperty = %d,class_addMethod_Getter = %d,class_addMethod_Setter = %d",suc0,suc1,suc2);
}

#pragma mark - 新增協議
-(void)btt_class_addProtocol {
    //引數:1.類Class 2.協議
    //返回:BOOL
    BOOL result = class_addProtocol([self class], NSProtocolFromString(@"UITableViewDelegate"));
    NSLog(@"btt_class_addProtocol:%d",result);
}
#pragma mark - 判斷是否響應方法
-(void)btt_class_respondsToSelector {
    //引數:1.類Class 2.方法名SEL
    //返回:BOOL
    BOOL result = class_respondsToSelector(self.class, @selector(viewDidLoad));
    NSLog(@"btt_class_respondsToSelector:%d",result);
}

#pragma mark - 獲取方法實現
- (void)btt_class_getMethodImplementation {
    //引數:1.類Class 2.方法名SEL
    //返回:方法實現IMP
    IMP result = class_getMethodImplementation([ViewController class], @selector(btt_method));
    result();
}

- (void)btt_method {
    NSLog(@"btt_method btt_method btt_method");
}
#pragma mark - 交換方法
- (void)btt_class_replaceMethod {
    [self btt_method1];
    //引數:1.類Class 2.方法名SEL 3.方法的實現IMP 4.方法引數描述
    //返回:BOOL
    BOOL result = class_replaceMethod([self class], @selector(btt_method1), [self methodForSelector:@selector(btt_method2)], NULL);
    NSLog(@"btt_class_replaceMethod:%d",result);
    [self btt_method1];
}
- (void)btt_method1 {
    NSLog(@"btt_method1");
}
- (void)btt_method2 {
    NSLog(@"btt_method2");
}

#pragma mark - 獲取整個類的例項方法
- (void)btt_class_copyMethodList {
    //引數:1、類Class 2、unsigned int 型別
    //返回:整個類的例項方法
    unsigned int copycopyMethodListCount = 0;
    Method *methods = class_copyMethodList([self class], &copycopyMethodListCount);
    for (NSInteger i = 0; i < copycopyMethodListCount; i++) {
        Method method = methods[i];
        SEL name = method_getName(method);
        NSLog(@"btt_class_copyMethodList:%@",NSStringFromSelector(name));
    }
    free(methods);//釋放
}

#pragma mark - 獲取類方法
- (void)btt_class_getClassMethod {
    //入參:1.類Class 2.方法名SEL
    //返回:method結構體指標
    Method result = class_getClassMethod(self.class, @selector(bttClassMethod));
    NSLog(@"btt_class_getClassMethod:%p",result);
}

+ (void)bttClassMethod {
    NSLog(@"我是類方法");
}

#pragma mark - 獲取類的例項方法
- (void)btt_class_getInstanceMethod {
    //引數:1.類Class 2.方法名SEL
    //返回:method結構體指標
    Method result = class_getInstanceMethod(self.class, @selector(btt_method));
    NSLog(@"btt_class_getInstanceMethod:%p",result);
}
#pragma mark - 給類新增方法
- (void)btt_addMethod {
    //引數:1.類Class 2.方法名 3.imp,函式實現 4.方法引數型別描述
    //返回值:BOOL
    BOOL result = class_addMethod(self.class, NSSelectorFromString(@"lgMethod"), [self methodForSelector:@selector(btt_method)], "@@:");
    NSLog(@"btt_addMethod:%d",result);
}

#pragma mark - 獲取整個屬性列表
- (void)btt_class_copyPropertyList {
    //引數:1.類Class 2.unsigned int型別
    //返回:屬性列表
    unsigned int copyPropertyListCount = 0;
    objc_property_t *propertys = class_copyPropertyList([self class], &copyPropertyListCount);
    for (NSInteger i = 0; i < copyPropertyListCount; i++) {
        objc_property_t property = propertys[i];
        const char *name = property_getName(property);
        NSLog(@"btt_class_copyPropertyList:%s",name);
    }
    free(propertys);//釋放
}
#pragma mark - 獲取指定的屬性
- (void)btt_class_getProperty {
    //引數:1.類Class 2.屬性名
    //返回:屬性objc_property_t
    objc_property_t result = class_getProperty(self.class, [@"logic" UTF8String]);
    NSLog(@"btt_class_getProperty:%p",result);
}

#pragma mark - 獲取類的weak修飾的例項變數
- (void)btt_class_getWeakIvarLayout {
    //引數:類Class
    //返回:返回值是指向 uint8_t 的指標
    const uint8_t *result = class_getWeakIvarLayout(self.class);
    NSLog(@"btt_class_getIvarLayout:%p",result);
}

#pragma mark - 設定類的例項變數的修飾符為weak
- (void)btt_class_setWeakIvarLayout{
    uint8_t u = 1;
    const uint8_t *u8  = &u;
    //引數:1.類Class 2.const uint8_t *
    class_setWeakIvarLayout(self.class, u8);
}

#pragma mark - 設定類的例項變數的修飾符
- (void)btt_class_setIvarLayout {
    uint8_t u = 1;
    const uint8_t *u8  = &u;
    //引數:1.類Class 2.const uint8_t *
    class_setIvarLayout(self.class, u8);
}

#pragma mark - 獲取類的例項變數的修飾符
- (void)btt_class_getIvarLayout {
    //引數:類Class
    //返回:返回值是指向 uint8_t 的指標
    const uint8_t *result = class_getIvarLayout(self.class);
    NSLog(@"btt_class_getIvarLayout:%p",result);
}
#pragma mark - 獲取整個成員變數列表
- (void)btt_class_copyIvarList {
    //入參:1、類Class 2、unsigned int型別
    //返回:Ivar 型別的指標陣列
    unsigned int copyIvarListCount = 0;
    Ivar *ivars = class_copyIvarList([self class], &copyIvarListCount);
    for (NSInteger i = 0; i< copyIvarListCount; i ++) {
        Ivar ivar = ivars[i];
        const char *name = ivar_getName(ivar);
        NSLog(@"btt_class_copyIvarList:%s",name);
    }
    free(ivars);//釋放
}

#pragma mark - 為動態建立的類新增變數
- (void)btt_class_addIvar {
    Class CreatClass0 = objc_allocateClassPair([NSObject class], "CreatClass0", 0);
    class_addIvar(CreatClass0, "_attribute0", sizeof(NSString *), log(sizeof(NSString *)), "i");
    Ivar ivar = class_getInstanceVariable(CreatClass0, "_attribute0");//獲取變數,如果沒獲取到說明不存在
    NSLog(@"btt_class_addIvar:%@",[NSString stringWithUTF8String:ivar_getName(ivar)]);
    objc_registerClassPair(CreatClass0);
}
#pragma mark - 獲取指定的類變數的資訊的資料結構的指標
- (void)btt_class_getClassVariable {
    //引數:1.類Class 2.類變數名稱
    //返回:指定的類變數的資訊的資料結構的指標
    Ivar ivar = class_getClassVariable(self.class, [@"isa" UTF8String]);
    NSLog(@"btt_class_getClassVariable:%p",ivar);
}
#pragma mark - 判斷類是否為元類
- (void)btt_class_isMetaClass {
    //參書:類Class
    //返回:BOOL型別
    BOOL result = class_isMetaClass([ViewController class]);
    NSLog(@"btt_class_isMetaClass:%d",result);
}
#pragma mark - 獲取父類
- (void)btt_class_getSuperclass {
    //引數:類Class
    //返回:父類Class
    Class result = class_getSuperclass([ViewController class]);
    NSLog(@"btt_class_getName:%@",result);
}
#pragma mark - 獲取類名
- (void)btt_class_getName {
    //引數:類Class
    //返回:類名char陣列
    const char *result = class_getName([ViewController class]);
    NSLog(@"btt_class_getName:%@",[NSString stringWithUTF8String:result]);
}
#pragma mark - 獲取例項大小
- (void)btt_class_getInstanceSize {
    //引數:類Class
    //返回:類的例項大小
    size_t result = class_getInstanceSize([ViewController class]);
    NSLog(@"btt_class_getInstanceSize:%zu",result);
}
#pragma mark - 獲取類中指定的例項變數的資訊的資料結構的指標
- (void)btt_class_getInstanceVariable {
    //引數:1.類Class 2.例項變數的名稱
    //返回:Ivar指標
    const char *result1 = [@"_logic" UTF8String];
    Ivar result2 = class_getInstanceVariable([self class], result1);
    NSLog(@"btt_class_getInstanceVariable:%p",result2);
}

@end