#import 
     
      @implementation NSDictionary (Log)//重写系统的方法控制输出-(NSString *)descriptionWithLocale:(id)locale indent:(NSUInteger)level{//    return @"你大爷是你大姐";    NSMutableString *string = [NSMutableString string];        //{}    [string appendString:@"{
    "];        //拼接key--value    [self enumerateKeysAndObjectsUsingBlock:^(id  _Nonnull key, id  _Nonnull obj, BOOL * _Nonnull stop) {        [string appendFormat:@"%@:",key];        [string appendFormat:@"%@,",obj];            }];    [string appendString:@"}"];        //删除逗号    //从后往前搜索 得到的是搜索到的第一个符号的位置    NSRange range = [string rangeOfString:@"," options:NSBackwardsSearch];    if (range.location != NSNotFound) {        [string deleteCharactersInRange:range];    }        return string;}@end@implementation NSArray (Log)//重写系统的方法控制输出-(NSString *)descriptionWithLocale:(id)locale indent:(NSUInteger)level{    //    return @"你大爷是你大姐";    NSMutableString *string = [NSMutableString string];        //{}    [string appendString:@"["];        //拼接obj    [self enumerateObjectsUsingBlock:^(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {        [string appendFormat:@"%@,\n",obj];    }];    [string appendString:@"]"];        //删除逗号    //从后往前搜索 得到的是搜索到的第一个符号的位置    NSRange range = [string rangeOfString:@"," options:NSBackwardsSearch];    if (range.location != NSNotFound) {        [string deleteCharactersInRange:range];    }    return string;}@end