#import "NSObject+NIL.h"
#import <objc/runtime.h>
@implementation NSObject (NIL)
+ (void)load
{
Method objectAtIndex = class_getClassMethod(objc_getClass("NSArray"), @selector(arrayWithObjects:count:));
Method my_objectAtIndex = class_getClassMethod( objc_getClass("NSArray"), @selector(my_arrayWithObjects:count:));
method_exchangeImplementations(objectAtIndex,my_objectAtIndex);
Method insertObject = class_getInstanceMethod(objc_getClass("__NSArrayM"), @selector(insertObject:atIndex:));
Method my_insertObject = class_getInstanceMethod(objc_getClass("__NSArrayM"), @selector(my_insertObject:atIndex:));
method_exchangeImplementations(insertObject,my_insertObject);
}
//数组添加空测试
- (void)my_insertObject:(id)anObject atIndex:(NSUInteger)index
{
@try {
[self my_insertObject:anObject atIndex:index];
} @catch (NSException *exception) {
NSDictionary *dic = [exception valueForKey:@"reserved"];
NSString * str = dic[@"callStackSymbols"][5];
str = [str substringFromIndex:[str rangeOfString:@"-"].location];
str =[str substringToIndex:[str rangeOfString:@" +"].location];
NSLog(@"%@里面的数组第%ld个元素为空", [str substringFromIndex:[str rangeOfString:@"-"].location],index);
} @finally {
}
}
//初始化数组为空测试
+ (instancetype)my_arrayWithObjects:(const id *)anObject count:(NSUInteger)index;
{
@try {
id d = [self my_arrayWithObjects:anObject count:index];
return d;
} @catch (NSException *exception) {
int num = 0;
for (int i = 0; i<index; i++) {
if (*(anObject+i) == nil) {
num = i;
}
}
NSDictionary *dic = [exception valueForKey:@"reserved"];
NSString * str = dic[@"callStackSymbols"][6];
str = [str substringFromIndex:[str rangeOfString:@"-"].location];
str =[str substringToIndex:[str rangeOfString:@" +"].location];
NSLog(@"%@里面的数组第%d个元素为空", [str substringFromIndex:[str rangeOfString:@"-"].location],num);
return nil;
} @finally {
}
}
@end
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