尝试在字典中插入字典 return nil

Question

我尝试通过将字典作为参数传递到方法中来将字典插入到字典中。我有一个字典，键为 0,1,2,...,6，它由字典组成，我尝试在新字典中获取键为 0 的字典，但新字典为零。

dictionaryWithWeekDays 包含如下内容：

0 =     {
        clouds = 0;
        deg = 239;
        dt = 1475175600;
        humidity = 76;
        pressure = "993.71";
        speed = "3.24";
        temp =         {
            day = "70.09";
            eve = "74.73";
            max = "76.64";
            min = "51.53";
            morn = "54.66";
            night = "51.53";
        };
        weather =         (
                        {
                description = "light rain";
                icon = 10d;
                id = 500;
                main = Rain;
            }
        );
    };
    1 =     {
        clouds = 12;
        deg = 337;
        dt = 1475607600;
        humidity = 0;
        pressure = "1012.86";
        speed = "3.89";
        temp =         {
            day = "59.59";
            eve = "64.56";
            max = "64.56";
            min = "49.64";
            morn = "49.64";
            night = "54.32";
        };
        weather =         (
                        {
                description = "light rain";
                icon = 10d;
                id = 500;
                main = Rain;
            }
        );
    };

我有一个 for 循环，因为我想传递方法中的所有键。我只是像这样将我的方法调用到循环中：

for (int i = 0; i <= 6; i++) {
        NSString *key = [NSString stringWithFormat:@"%i", i];
        [self addValuesToArrayWithTemp:dictionaryWithWeekDays key:key index:i];
}

这是我的 addValuesToArrayWithTemp :

-(void) addValuesToArrayWithTemp:(NSDictionary *)inputDic key:(NSString *)key index:(int)ind {
    NSDictionary *currentDic = [inputDic objectForKey:key];
    NSLog(@"currentDic = %@", currentDic);
    NSLog(@"key = %@", key);
   ...
   ...
}

(NSDictionary *)inputDic - 没关系，它包含我之前传递的所有内容，键也可以有 @"0" 值。但 currentDic 为零。为什么？？也许我误解了什么。感谢帮助！

Answer 1

我假设您的 dictionaryWithWeekDays 打印输出来自调试器。我相信您在 dictionaryWithWeekDays 中的键不是字符串，如果是，列表应显示“0”= 而不是 0 =

您想检查 dictionaryWithWeekDays 中键值的实际类型。

尝试在字典中插入字典 return nil

Try ti insert dictionary in dictionary return nil

objective-c

nsdictionary

nsarray

ios