Question

我有这段代码（效果很好）：

    [customServicesArray addObject: userPreferences.aCustomServices1];
    [customServicesArray addObject: userPreferences.aCustomServices2];
    [customServicesArray addObject: userPreferences.aCustomServices3];
    [customServicesArray addObject: userPreferences.aCustomServices4];
    [customServicesArray addObject: userPreferences.aCustomServices5];
    [customServicesArray addObject: userPreferences.aCustomServices6];
    [customServicesArray addObject: userPreferences.aCustomServices7];
    [customServicesArray addObject: userPreferences.aCustomServices8];
    [customServicesArray addObject: userPreferences.aCustomServices9];
    [customServicesArray addObject: userPreferences.aCustomServices10];
    [customServicesArray addObject: userPreferences.aCustomServices11];
    [customServicesArray addObject: userPreferences.aCustomServices12];
    [customServicesArray addObject: userPreferences.aCustomServices13];
    [customServicesArray addObject: userPreferences.aCustomServices14];
    [customServicesArray addObject: userPreferences.aCustomServices15];
    [customServicesArray addObject: userPreferences.aCustomServices16];
    [customServicesArray addObject: userPreferences.aCustomServices17];
    [customServicesArray addObject: userPreferences.aCustomServices18];
    [customServicesArray addObject: userPreferences.aCustomServices19];
    [customServicesArray addObject: userPreferences.aCustomServices20];
    [customServicesArray addObject: userPreferences.aCustomServices21];
    [customServicesArray addObject: userPreferences.aCustomServices22];
    [customServicesArray addObject: userPreferences.aCustomServices23];
    [customServicesArray addObject: userPreferences.aCustomServices24];

    unsortedCustomArray = customServicesArray;

我正试图简化＆＃34;使用此代码：

    unsortedCustomArray = [NSMutableArray new];  //  initialize the array
    for (NSUInteger i = 0; i < 24; i++) {
        NSString *key = [NSString stringWithFormat:@"userPreferences.aCustomServices%u",i+1];
    }

我想要＆＃34;内容＆＃34;数组中的userPreferences.aCustomServices n ，但我在数组中得到的是：

userPreferences.aCustomServices1,
userPreferences.aCustomServices2,
userPreferences.aCustomServices3,
userPreferences.aCustomServices4,
userPreferences.aCustomServices5,
userPreferences.aCustomServices6,
userPreferences.aCustomServices7,
userPreferences.aCustomServices8,
userPreferences.aCustomServices9,
... and so on...

如何更改代码以便添加userPreferences.aCustomServices对象的内容？

Answer 1

您可以使用KVC：

[customServicesArray addObject:[userPreferences valueForKey:key]];

但您需要将密钥生成更改为：

NSString *key = [NSString stringWithFormat:@"aCustomServices%u",i+1];

如何添加＆＃34; key＆＃34;的内容到NSMutableArray？

1 个答案: