iOS开发小技巧--字典和数组的中文输出

一、在解析json数据的时候，得到的集合对象或者数组对象在用%@打印的时候回出现类似乱码的情况。如图：

在iOS中打印字典或者数组对象，系统会默认调用字典对象和数组对象的descriptionWithLocale:方法。所以解决方案就是增加在.m文件中重写了两个descriptionWithLocale:方法。以后用的时候直接将文件拖进项目。

//
//  NSDictionary+Log.m
//  05-掌握-多值参数
//
//  Created by xiaomage on 15/7/13.
//  Copyright (c) 2015年 小码哥. All rights reserved.
//

#import <Foundation/Foundation.h>

@implementation NSDictionary (Log)
- (NSString *)descriptionWithLocale:(id)locale
{
    NSMutableString *string = [NSMutableString string];
    
    // 开头有个{
    [string appendString:@"{
"];
    
    // 遍历所有的键值对
    [self enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
        [string appendFormat:@"	%@", key];
        [string appendString:@" : "];
        [string appendFormat:@"%@,
", obj];
    }];
    
    // 结尾有个}
    [string appendString:@"}"];
    
    // 查找最后一个逗号
    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];
    
    // 开头有个[
    [string appendString:@"[
"];
    
    // 遍历所有的元素
    [self enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
        [string appendFormat:@"	%@,
", obj];
    }];
    
    // 结尾有个]
    [string appendString:@"]"];
    
    // 查找最后一个逗号
    NSRange range = [string rangeOfString:@"," options:NSBackwardsSearch];
    if (range.location != NSNotFound)
    [string deleteCharactersInRange:range];
    
    return string;
}

@end

• 效果图