Question

我有一个NSMutableDictionary：

sampleDict = [NSMutableDictionary new];

[sampleDict setObject:@"FooIndex" forKey:@"Key_1"]; // adds @"Foo"
[sampleDict setObject:@"FooOne" forKey:@"Key_2"]; // adds @"Foo"
[sampleDict setObject:@"FooTwo" forKey:@"Key_3"]; // adds @"Foo"
[sampleDict setObject:@"FoFour" forKey:@"Key_4"]; // adds @"Foo"
[sampleDict setObject:@"FooFivve" forKey:@"Key_5"]; // adds @"Foo"

我想在这里将这个词典添加到Array on Button动作这样的代码，

arraytesting = [NSMutableArray new];

- (IBAction)action:(id)sender {
    [arraytesting addObject:sampleDict];
    NSLog(@"Sample arraytesting>>>>> %@",arraytesting);

}

最后输出是：

(
        {
        "Key_1" = FooIndex;
        "Key_2" = FooOne;
        "Key_3" = FooTwo;
        "Key_4" = FoFour;
        "Key_5" = FooFivve;
    }
)

但是当我需要更新字典时：

[sampleDict setObject:@"one" forKey:@"Key_1"]; // adds @"Foo"
[sampleDict setObject:@"two" forKey:@"Key_2"]; // adds @"Foo"
[sampleDict setObject:@"three" forKey:@"Key_3"]; // adds @"Foo"
[sampleDict setObject:@"FoFour" forKey:@"Key_4"]; // adds @"Foo"
[sampleDict setObject:@"FooFivve" forKey:@"Key_5"]; // adds @"Foo"

输出如下：

(
    {
        "Key_1" = FooIndex;
        "Key_2" = FooOne;
        "Key_3" = FooTwo;
        "Key_4" = FoFour;
        "Key_5" = FooFivve;
    },
    {
        "Key_1" = FooIndex;
        "Key_2" = FooOne;
        "Key_3" = FooTwo;
        "Key_4" = FoFour;
        "Key_5" = FooFivve;
    }
)

我希望输出如下：

(
    {
        "Key_1" = FooIndex;
        "Key_2" = FooOne;
        "Key_3" = FooTwo;
        "Key_4" = FoFour;
        "Key_5" = FooFivve;
    },
    {
        "Key_1" = one;
        "Key_2" = two;
        "Key_3" = three;
        "Key_4" = FoFour;
        "Key_5" = FooFivve;
    }
)

Answer 1

要为数组添加对象的引用。之后，您编辑字典并再次添加引用。您可以调用copy来创建sampleDict的新实例。你的方法必须是这样的：

- (IBAction)action:(id)sender { [arraytesting addObject:[sampleDict copy]]; NSLog(@"Sample arraytesting>>>>> %@",arraytesting); }

Answer 2

[sampleDict setObject:@"one" forKey:@"Key_1"]; // adds @"Foo"
[sampleDict setObject:@"two" forKey:@"Key_2"]; // adds @"Foo"
[sampleDict setObject:@"three" forKey:@"Key_3"]; // adds @"Foo"
[sampleDict setObject:@"FoFour" forKey:@"Key_4"]; // adds @"Foo"
[sampleDict setObject:@"FooFivve" forKey:@"Key_5"]; // adds @"Foo"

在这里，您使用相同的sampleDict参考。而不是再创建一个新的Object并添加。

smapleDict = [NSMutableArray new]

[sampleDict setObject:@"one" forKey:@"Key_1"]; // adds @"Foo"
    [sampleDict setObject:@"two" forKey:@"Key_2"]; // adds @"Foo"
    [sampleDict setObject:@"three" forKey:@"Key_3"]; // adds @"Foo"
    [sampleDict setObject:@"FoFour" forKey:@"Key_4"]; // adds @"Foo"
    [sampleDict setObject:@"FooFivve" forKey:@"Key_5"]; // adds @"Foo"

Answer 3

你的词典a是一个参考，所以你需要它的可变副本，如果你不修改原始词典，这将修改你阵列上的所有词干，所以你需要复制，修改并添加到您的数组，像这样

map

我希望这有助于你

将NSMutableDictionary添加到Array for Button Action

3 个答案: