iOS 獲取類的全部屬性和全部方法 +（用例拓展：MVC的資料解析==資料對映）
阿新 • • 發佈：2019-01-31
備註：
#import <objc/runtime.h>1.獲取類的全部屬性
<span style="font-size: 18px; font-family: Arial, Helvetica, sans-serif;"></span><pre name="code" class="html">/** * 獲取類的所有屬性 */ +(void)showStudentClassProperties { Class cls = [Student class]; unsigned int count; while (cls!=[NSObject class]) { objc_property_t *properties = class_copyPropertyList(cls, &count); for (int i = 0; i<count; i++) { objc_property_t property = properties[i]; NSString *propertyName = [[NSString alloc] initWithCString:property_getName(property) encoding:NSUTF8StringEncoding]; NSLog(@"屬性名==%@",propertyName); } if (properties){ //要釋放 free(properties); } //得到父類的資訊 cls = class_getSuperclass(cls); } }
<span style="font-size: 18px; font-family: Arial, Helvetica, sans-serif;">2.獲取類的全部方法</span>3.獲取類的全部方法/** * 獲取類的所有方法 */ +(void)showStudentClassMethods { unsigned int count; Class cls = [Student class]; while (cls!=[NSObject class]){ Method *methods = class_copyMethodList(cls, &count); for (int i=0; i < count; i++) { NSString *methodName = [NSString stringWithCString:sel_getName(method_getName(methods[i])) encoding:NSUTF8StringEncoding]; NSLog(@"方法名：%@ ", methodName); } if (methods) { free(methods); } cls = class_getSuperclass(cls); } }
/** * 獲取類的所有屬性 做健值反射 */ +(Student *)showStudentClassPropertiesToMapValueWithDic:(NSDictionary *)dic { Student *stu = [[Student alloc] init]; Class cls = [Student class]; unsigned int count; while (cls!=[NSObject class]) { objc_property_t *properties = class_copyPropertyList(cls, &count); for (int i = 0; i<count; i++) { objc_property_t property = properties[i]; NSString *propertyName = [[NSString alloc] initWithCString:property_getName(property) encoding:NSUTF8StringEncoding]; //得到屬性名可以在這裡做反射 反饋過來的dic 直接反射成一個model /** * valueForKey: 是 KVC(NSKeyValueCoding) 的方法，在 KVC 裡可以通過 property 同名字串來獲取對應的值 * 這裡的dic 的key 與 stu 的屬性名一一對應 * （MVC模式設計資料反射時候用到{類定義屬性時候要和服務端反饋過來的欄位一樣}） */ id propertyValue = [dic valueForKey:propertyName]; if (propertyValue) [stu setValue:propertyValue forKey:propertyName];//屬性get set賦值 // NSLog(@"%@ = %@",propertyName,propertyValue); } if (properties){ free(properties); } //得到父類的資訊 cls = class_getSuperclass(cls); } return stu; }
==========================================================================================================
全部程式碼
.h
//
// Student.h
// demo
//
// Created by linpeng on 14-7-22.
// Copyright (c) 2014年 linpeng. All rights reserved.
//
#import <Foundation/Foundation.h>
@interface People : NSObject
/**
* 名字
*/
@property(nonatomic,strong)NSString *name;
/**
* 性別
*/
@property(nonatomic,strong)NSString *sex;
/**
* 年齡
*/
@property(nonatomic,)NSInteger age;
@end
/**
* //////////////////////////////////////////////////////////////////////////////////////
*/
@interface Student : People
/**
* 學校
*/
@property(nonatomic,strong)NSString *school;
/**
* 班級
*/
@property(nonatomic,strong)NSString *classroom;
@end
/**
* //////////////////////////////////////////////////////////////////////////////////////
*/
@interface StudentManage : NSObject
+(void)showStudentClassProperties;
+(Student *)showStudentClassPropertiesToMapValueWithDic:(NSDictionary *)dic;
+(void)showStudentClassMethods;
@end
.m
//
// Student.m
// demo
//
// Created by linpeng on 14-7-22.
// Copyright (c) 2014年 linpeng. All rights reserved.
//
#import "Student.h"
#import <objc/runtime.h>
@implementation People
-(void)pers
{
}
@end
@implementation Student
-(void)show
{
}
-(void)hide
{
}
@end
@implementation StudentManage
/**
* 獲取類的所有屬性
*/
+(void)showStudentClassProperties
{
Class cls = [Student class];
unsigned int count;
while (cls!=[NSObject class]) {
objc_property_t *properties = class_copyPropertyList(cls, &count);
for (int i = 0; i<count; i++) {
objc_property_t property = properties[i];
NSString *propertyName = [[NSString alloc] initWithCString:property_getName(property) encoding:NSUTF8StringEncoding];
NSLog(@"屬性名==%@",propertyName);
}
if (properties){
//要釋放
free(properties);
}
//得到父類的資訊
cls = class_getSuperclass(cls);
}
}
/**
* 獲取類的所有屬性 做健值反射
*/
+(Student *)showStudentClassPropertiesToMapValueWithDic:(NSDictionary *)dic
{
Student *stu = [[Student alloc] init];
Class cls = [Student class];
unsigned int count;
while (cls!=[NSObject class]) {
objc_property_t *properties = class_copyPropertyList(cls, &count);
for (int i = 0; i<count; i++) {
objc_property_t property = properties[i];
NSString *propertyName = [[NSString alloc] initWithCString:property_getName(property) encoding:NSUTF8StringEncoding];
//得到屬性名可以在這裡做反射 反饋過來的dic 直接反射成一個model
/**
* valueForKey: 是 KVC(NSKeyValueCoding) 的方法，在 KVC 裡可以通過 property 同名字串來獲取對應的值
* 這裡的dic 的key 與 stu 的屬性名一一對應
* （MVC模式設計資料反射時候用到{類定義屬性時候要和服務端反饋過來的欄位一樣}）
*/
id propertyValue = [dic valueForKey:propertyName];
if (propertyValue)
[stu setValue:propertyValue forKey:propertyName];//屬性get set賦值
// NSLog(@"%@ = %@",propertyName,propertyValue);
}
if (properties){
free(properties);
}
//得到父類的資訊
cls = class_getSuperclass(cls);
}
return stu;
}
/**
* 獲取類的所有方法
*/
+(void)showStudentClassMethods
{
unsigned int count;
Class cls = [Student class];
while (cls!=[NSObject class]){
Method *methods = class_copyMethodList(cls, &count);
for (int i=0; i < count; i++) {
NSString *methodName = [NSString stringWithCString:sel_getName(method_getName(methods[i])) encoding:NSUTF8StringEncoding];
NSLog(@"方法名：%@ ", methodName);
}
if (methods) {
//要釋放
free(methods);
}
//得到父類的資訊
cls = class_getSuperclass(cls);
}
}
@end=========================================
判別這個屬性是否具備get set方法 （重要！以上都要新增這個判別）
NSString *propertySetMethod = [NSString stringWithFormat:@"set%@%@:", [[propertyName substringToIndex:1] capitalizedString]
,[propertyName substringFromIndex:1]];
SEL selector = NSSelectorFromString(propertySetMethod);
if ([model respondsToSelector:selector])
{
[model setValue:propertyValue forKey:propertyName];
}
使用：
/**
* dic 服務端反饋過來的字典物件（學生基本資訊屬性）school name age classroom等等
* Student 面向物件的 學生model（屬性和伺服器端反饋過來的屬性--key要一直：school name age classroom等等）
*/
NSDictionary *dic = [NSDictionary dictionaryWithObjectsAndKeys:@"廈門大學",@"school",@"屎殼郎情調",@"name",@24,@"age",nil];
//dic===>model(student)
Student *stu = [StudentManage showStudentClassPropertiesToMapValueWithDic:dic];
NSLog(@"基本資訊：%@",stu);
