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:@"{\n"];

     // 遍历所有的键值对
     [self enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
         [string appendFormat:@"\t%@", key];
         [string appendString:@" : "];
         [string appendFormat:@"%@,\n", 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:@"[\n"];

     // 遍历所有的元素
     [self enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
         [string appendFormat:@"\t%@,\n", 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