[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:(
     "U5954U9a70",
     "U5b9dU9a6c",
     "U8defU864e",
     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":@26,
                           };
    //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
     */