[BS-14] 打印NSArray和NSDictionary的3种方法

打印NSArray和NSDictionary的3种方法

    NSArray *arr = @[@"奔驰",@"宝马",@"路虎",@"Tesla"];

    //1.直接打印

    NSLog(@"arr:%@",arr);

    //2.使用for...in遍历

    for (NSString *str in arr) {

        NSLog(@"%@",str);

    }

    //3.使用枚举遍历

    [arr enumerateObjectsUsingBlock:^(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {

        NSLog(@"arr[%lu] = %@",(unsigned long)idx,obj);

    }];

    /*打印结果如下：

     2016-05-06 23:06:21.876 打印NSArray和NSDictionary[4048:370831] arr:(

     "\U5954\U9a70",

     "\U5b9d\U9a6c",

     "\U8def\U864e",

     Tesla

     )

     2016-05-06 23:06:21.877 打印NSArray和NSDictionary[4048:370831] 奔驰

     2016-05-06 23:06:21.877 打印NSArray和NSDictionary[4048:370831] 宝马

     2016-05-06 23:06:21.877 打印NSArray和NSDictionary[4048:370831] 路虎

     2016-05-06 23:06:21.878 打印NSArray和NSDictionary[4048:370831] Tesla

     2016-05-06 23:06:21.878 打印NSArray和NSDictionary[4048:370831] arr[0] = 奔驰

     2016-05-06 23:06:21.878 打印NSArray和NSDictionary[4048:370831] arr[1] = 宝马

     2016-05-06 23:06:21.878 打印NSArray和NSDictionary[4048:370831] arr[2] = 路虎

     2016-05-06 23:06:21.878 打印NSArray和NSDictionary[4048:370831] arr[3] = Tesla

     */

    NSDictionary *dict = @{@"name":@"Steven",

                           @"sex":@"M",

                           @"age":@,

                           };

    //1.直接打印

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

    //2.使用for...in遍历

    for (NSString *key in dict.allKeys) {

        NSLog(@"%@:%@",key,dict[key]);

    }

    //3.使用枚举遍历

    [dict enumerateKeysAndObjectsUsingBlock:^(id  _Nonnull key, id  _Nonnull obj, BOOL * _Nonnull stop) {

        NSLog(@"%@-%@",key,obj);

    }];

}

    /*打印结果如下：

     2016-05-06 23:06:21.878 打印NSArray和NSDictionary[4048:370831] dict:{

     age = 26;

     name = Steven;

     sex = M;

     }

     2016-05-06 23:06:21.878 打印NSArray和NSDictionary[4048:370831] sex:M

     2016-05-06 23:06:21.878 打印NSArray和NSDictionary[4048:370831] name:Steven

     2016-05-06 23:06:21.878 打印NSArray和NSDictionary[4048:370831] age:26

     2016-05-06 23:06:21.879 打印NSArray和NSDictionary[4048:370831] sex-M

     2016-05-06 23:06:21.965 打印NSArray和NSDictionary[4048:370831] name-Steven

     2016-05-06 23:06:21.965 打印NSArray和NSDictionary[4048:370831] age-26

     */