将新输入字符串保存到NSMutableArray iPhone [英] Saving new input strings to NSMutableArray iPhone

问题描述

我使用下面的代码添加字符串到 NSMutableArray 。但我面临的问题是，每当我添加一个新的值到 NSMutableArray ，以前的值被删除，新的值，所以总是有一个值。 / p>

我必须将此 NSMutableArray 保存到 NSUserDefaults 我会用它在其他屏幕上。

我已搜索alot，请帮助我

代码是：

   - （IBAction）addChildren：（id）sender {
 inputChildName = nameOfChild.text; 
 childArray = [[NSMutableArray alloc] init]; 
 [self.childArray addObject：inputChildName]; 
 NSUserDefaults * childrenNamesForLabel = [NSUserDefaults standardUserDefaults]; 
 [childrenNamesForLabel setObject：childArray forKey：@children]; 
 [childrenNamesForLabel synchronize]; 
 NSLog（@CHILDREN ARRAY :::％@，childArray）; 
} 
  

解决方案

因为每当你收到addChildren您将重新创建childArray，这意味着它将包含0个对象，然后您添加一个对象。

  childArray = [[NSMutableArray alloc] init]; 
 [self.childArray addObject：inputChildName]; 
  

移动 childArray = [[NSMutableArray alloc] init]; 到init或load方法，它应该工作。

I am using below code to add strings to NSMutableArray. But the issue I am facing is that whenever I add a new value to the NSMutableArray, previous value gets deleted and new value comes in, so there is always a single value.

I have to save this NSMutableArray to NSUserDefaults so that I would use it on other screens too.

I have searched alot please do help me

code is:

- (IBAction)addChildren:(id)sender {
    inputChildName = nameOfChild.text;
    childArray = [[NSMutableArray alloc] init];
    [self.childArray addObject:inputChildName];
    NSUserDefaults *childrenNamesForLabel = [NSUserDefaults standardUserDefaults];
    [childrenNamesForLabel setObject:childArray forKey:@"children"];
    [childrenNamesForLabel synchronize];
    NSLog(@"CHILDREN ARRAY::: %@", childArray);
}

解决方案

Because whenever you receive your addChildren action you re-create the childArray which means it will contain 0 objects, then you add one object.

childArray = [[NSMutableArray alloc] init];
[self.childArray addObject:inputChildName];

Move childArray = [[NSMutableArray alloc] init]; to an init or load method and it should work.

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