IOS中 打印字典、数组时 直接显示中文（而不是显示Unicode字符）

IOS中打印时，中文一般会被默认转换为Unicode字符的形式。
针对字典和数组，可通过增加分类，并在分类中重写 descriptionWithLocale: 方法的形式，实现打印结果中直接显示中文。

// 字典的分类
@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


// 数组的分类
@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