#import "NSMutableArray+TonyRuntime.h"
#import <objc/runtime.h>
@implementation NSMutableArray (TonyRuntime)
+(void)load
{
staticdispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
Method sourceMethod1 = class_getInstanceMethod(objc_getClass("__NSArrayM"), @selector(objectAtIndex:));
Method destMethod1 =

class_getInstanceMethod(objc_getClass("__NSArrayM"), @selector(safeObjectAtIndex:));

method_exchangeImplementations(sourceMethod1, destMethod1);

Method sourceMethod2 = class_getInstanceMethod(objc_getClass("__NSArrayM"), @selector(removeObjectAtIndex:));
Method destMethod2 = class_getInstanceMethod(objc_getClass

("__NSArrayM"), @selector(safeRemoveObjectAtIndex:));

method_exchangeImplementations(sourceMethod2, destMethod2);

Method sourceMethod3 = class_getInstanceMethod(objc_getClass("__NSArrayM"), @selector(insertObject:atIndex:));
Method destMethod3 = class_getInstanceMethod(objc_getClass("__NSArrayM"), @selector

(safeInsertObject:atIndex:));

method_exchangeImplementations(sourceMethod3, destMethod3);

Method sourceMethod4 = class_getInstanceMethod(objc_getClass("__NSArrayM"), @selector(replaceObjectAtIndex:withObject:));
Method destMethod4 = class_getInstanceMethod(objc_getClass("__NSArrayM"), @selector(safeReplaceObjectAtIndex:withObject:));

method_exchangeImplementations(sourceMethod4, destMethod4);
    });
}
#pragma mark - 陣列的安全處理
-(instancetype)safeObjectAtIndex:(NSInteger)index
{
if (self.count < (index + 1)) {
NSLog(@"Runtime Warning:index %li out of bound",index);
return nil;
    }

return [selfsafeObjectAtIndex:index];
}
-(void)safeRemoveObjectAtIndex:(NSInteger)index
{
if (self.count <= index) {
NSLog(@"Runtime Warning:index %li out of bound",index);
return;
    }

    [selfsafeRemoveObjectAtIndex:index];
}
-(void)safeInsertObject:(id)object atIndex:(NSInteger)index
{
if (!object) {
NSLog(@"Runtime Warning:insert object can not be nil");
return;
    }

if (self.count < index) {
NSLog(@"Runtime Warning:insert object at index %li out of bound",index);
return;
    }

    [selfsafeInsertObject:object atIndex:index];
}
-(void)safeReplaceObjectAtIndex:(NSInteger)index withObject:(id)object
{
if (index >= self.count) {
NSLog(@"Runtime Warning:index %li out of bound",index);
return;
    }

if (!object) {
NSLog(@"Runtime Warning:object can not be empty");
return;
    }

    [selfsafeReplaceObjectAtIndex:index withObject:object];
}