需求：Xcode打印时，unicode码转中文

原理

• NSString都可以正常打印，不需转换

• 新建分类NSArray+Log，重写系统方法:

- (NSString *)description
{
    NSMutableString *strM = [NSMutableString stringWithString:@"(\n"];
    [self enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
        if ([obj isKindOfClass:[NSString class]])
        {
                [strM appendFormat:@"\t\t%@,\n", obj];
        }
        else
        {
                [strM appendFormat:@"\t\t%@,\n", [obj description]];
        }
    }];
    [strM appendString:@"\t\t)"];
    return strM;
}

• 建立分类NSDictionary+Log，重写它们的系统方法description

- (NSString *)description
{
    NSMutableString *strM = [NSMutableString stringWithString:@"\n{"];
    [self enumerateKeysAndObjectsUsingBlock:^(id key, id obj, BOOL *stop) {
        if ([obj isKindOfClass:[NSString class]])
        {
            [strM appendFormat:@" %@ = %@\n", key, obj];
        }
        else
        {
            [strM appendFormat:@" %@ = %@\n", key, [obj description]];
        }
    }];
    [strM appendString:@"}"];
    return strM;
}

测试

- (void)test
{
    NSArray *city = @[@"北京", @"广州",@"深圳",@"上海", @"重庆"];
    NSDictionary *dict = @{@"城市":@"北京", @"面积":@"xxx平方公里", @"人口":@"xxx万人"};

    NSLog(@" city :%@ ",city);
    NSLog(@" dict :%@ ",dict);
}

打印

 city :(
        北京,
        广州,
        深圳,
        上海,
        重庆,
        ) 

dict :
{ 城市 = 北京
 面积 = xxx平方公里
 人口 = xxx万人
}