Foundation+Log.m

#import <Foundation/Foundation.h>

@implementation NSDictionary (Log)
- (NSString *)descriptionWithLocale:(id)locale{
    NSMutableString *string = [NSMutableString string];
    
    // 開頭有個 {
    [string appendString:@"{\n"];
    
    // 遍歷所有的鍵值對
    [self enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
        [string appendFormat:@"\t%@", key];
        [string appendString:@" : "];
        [string appendFormat:@"%@,\n", obj];
    }];
    
    // 結尾有個}
    [string appendString:@"}"];
    
    // 查找最后一個逗號
    NSRange range = [string rangeOfString:@"," options:NSBackwardsSearch];
    if (range.location != NSNotFound){
        [string deleteCharactersInRange:range];
    }
    
    return string;
}
@end

@implementation NSArray (Log)
- (NSString *)descriptionWithLocale:(id)locale{
    NSMutableString *string = [NSMutableString string];
    
    // 開頭有個[
    [string appendString:@"[\n"];
    
    // 遍歷所有的元素
    [self enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
        [string appendFormat:@"\t%@,\n", obj];
    }];
    
    // 結尾有個]
    [string appendString:@"]"];
    
    // 查找最后一個逗號
    NSRange range = [string rangeOfString:@"," options:NSBackwardsSearch];
    if (range.location != NSNotFound){
        [string deleteCharactersInRange:range];
    }
    
    return string;
}

@end

2016-08-07 01:46:52.243 Log分類[50218:757534] 
{
    weathers : 
        [
              {
                  status : 晴轉多云,
                  city : Beijing
              },
              {
                  status : 晴轉多云,
                  city : Shanghai
              }
        ]
}