添加到以前保存的NSUserDefaults [英] Adding to a Previously saved NSUserDefaults

问题描述

我正在为iOS制作一款游戏，其中包括每个级别的评分系统。这里我有一些代码通过使用委托获得一个 NSString （ passedValue1 ）。

代表委托代码：

  LevelCompleteLevel1 
  

.h

  #importViewController.h
 @interface LevelCompleteLevel1：UIViewController {
 IBOutlet UILabel * label; 
 
 ViewController * secondviewData; 
} 
 @property（nonatomic，retain）ViewController * secondviewData; 
  

.m

  ViewController * second = [[ViewController alloc] initWithNibName：nil bundle：nil]; 
 self.secondviewData = second; 
 secondviewData.passedValue1 = label.text; 
 [self presentModalViewController：second animated：YES]; 
  

在 .m 中，我发送从当前 viewcontroller 中的标签的值到另一个视图控制器，我发送的值称为 passValue1

一旦我发送了我需要显示并保存在我的 ViewController

  ViewController 
  

.h

  @interface ViewController：UIViewController {
 
 IBOutlet UILabel * label; 
 NSString * passedValue1; 
} 
 @property（nonatomic，retain）NSString * passedValue1; 
 
 @end 
  

.m p>

首先我... @synthesize passedValue1;

然后，我添加代码以接收我的 viewDidLoad 中的值，并在$ code> UILabel

$中显示我的值b
$ b

   - （void）viewDidLoad 
 {
 
 [super viewDidLoad]; 
 //加载视图后，执行任何其他设置，通常从nib 
 NSString * key = @labelKey; 
 
 //加载视图后，进行任何其他设置，通常从nib 
 if（passedValue1）{
 NSUserDefaults * prefs = [NSUserDefaults standardUserDefaults]; 
 
 NSObject * object = [prefs objectForKey：key]; 
 if（object！= nil）{
 NSUserDefaults * defults = [NSUserDefaults standardUserDefaults]; 
 [defults setObject：passedValue1 forKey：key]; 
 [defults synchronize]; 
} 
 else {
 NSUserDefaults * defults = [NSUserDefaults standardUserDefaults]; 
 
 NSInteger readScore = [[[NSUserDefaults standardUserDefaults] objectForKey：key] integerValue]; 
 NSInteger newValue = readScore + [passedValue1 integerValue]; 
 [defults setObject：[NSString stringWithFormat：@％d，newValue] forKey：key]; 
 [defults synchronize]; 
} 
} 
 label.text = [[NSUserDefaults standardUserDefaults] objectForKey：key]; 
  

}

一旦我显​​示值，然后使用 NSUserDefault 将其保存到标签中。但是，一旦我重播了我的游戏并获得了另一个分数值，我想将新$ code> passedValue1 值添加到当前保存的值...

例如：

说我玩我的水平，我的得分值为10.值为然后保存，我重播我的水平。然后我想把保存的值加到我刚刚得分的值上。所以说我得到的第二个值是20.我会喜欢我的代码添加在一起，给我一个值30。

任何人都可以帮助，因为我正在使用的代码不正确地执行我想要做的功能，它是添加上一个和当前传递的值。

提前感谢

编辑
Iam使用此代码：

   - （void）viewDidLoad 
 {
 
 [super viewDidLoad]; 
 //加载视图后，执行任何其他设置，通常从nib 
 NSString * key = @labelKey; 
 
 //加载视图后，进行任何其他设置，通常从nib 
 if（passedValue1）{
 NSUserDefaults * prefs = [NSUserDefaults standardUserDefaults]; 
 
 NSObject * object = [prefs objectForKey：key]; 
 if（object！= nil）{
 NSUserDefaults * defults = [NSUserDefaults standardUserDefaults]; 
 [defults setObject：passedValue1 forKey：key]; 
 [defults synchronize]; 
} 
 else {
 NSUserDefaults * defults = [NSUserDefaults standardUserDefaults]; 
 
 NSInteger readScore = [[[NSUserDefaults standardUserDefaults] objectForKey：key] integerValue]; 
 NSInteger newValue = readScore + [passedValue1 integerValue]; 
 [defults setValue：[NSString stringWithFormat：@％d，newValue] forKey：key]; 
 [defults synchronize]; 
} 
} 
 label.text = [[NSUserDefaults standardUserDefaults] objectForKey：key]; 
} 
  

为什么这不起作用，标签的显示值是最初传递的值？

解决方案

一次尝试这一个，

 code> NSUserDefaults * defaults = [NSUserDefaults standardUserDefaults]; 
 [defaults setObject：@10forKey：@old value]; 
 [默认同步]; 
 
 int k = [[defaults objectForKey：@old value] intValue] + newValue; 
  

I am making a game for iOS which in includes a scoring system in each level. Here I have some code that gets an NSString (passedValue1) by using a delegate.

Heres the code for the delegate:

LevelCompleteLevel1

.h

#import "ViewController.h"
@interface LevelCompleteLevel1 : UIViewController{
IBOutlet UILabel *label;

ViewController *secondviewData;
}
@property (nonatomic, retain)ViewController*secondviewData;

.m

ViewController *second = [[ViewController alloc] initWithNibName:nil bundle:nil];
self.secondviewData = second;
secondviewData.passedValue1 = label.text;
[self presentModalViewController:second animated:YES];

In the .m I send the a value from a label in the current viewcontroller to another view controller the value I send is called passedValue1

Once I have sent the value I need to display and save in my ViewController

ViewController

.h

@interface ViewController : UIViewController{

IBOutlet UILabel *label;
NSString *passedValue1;
}
@property (nonatomic, retain)NSString *passedValue1;

@end

.m

Firstly I ... @synthesize passedValue1;

Then i add the code to receive the value in my viewDidLoad and display my value in a UILabel

- (void)viewDidLoad
{ 

[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib
NSString *key=@"labelKey";

// Do any additional setup after loading the view, typically from a nib
if(passedValue1){
    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

    NSObject * object = [prefs objectForKey:key];
    if(object != nil){
        NSUserDefaults *defults = [NSUserDefaults standardUserDefaults];
        [defults setObject:passedValue1 forKey:key];
        [defults synchronize];
    }
    else{
        NSUserDefaults *defults = [NSUserDefaults standardUserDefaults];

        NSInteger readScore=[[[NSUserDefaults standardUserDefaults] objectForKey:key] integerValue];
        NSInteger newValue=readScore+[passedValue1 integerValue];
        [defults setObject:[NSString stringWithFormat:@"%d",newValue] forKey:key];
        [defults synchronize];
    }
}
label.text = [[NSUserDefaults standardUserDefaults]objectForKey:key];

}

Once I have displayed the value I then save it into a label using a NSUserDefault. However, once I have replayed my game and have another score value I would like to add the new passedValue1 value to the currently saved value...

For example:

say I play my level and I get the score value of 10. The value is then saved and I replay my level. I would then like to take the saved value and add it to the value i just scored. So thats say the second value I have scored is 20. I would then like my code to add them together and give me a value of 30.

can anyone help because the code I'm using does not correctly do the function that I want to do which is add the previous and the currently passed value.

Thanks in advance.

edit Iam using this code:

 - (void)viewDidLoad
{ 

[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib
NSString *key=@"labelKey";

// Do any additional setup after loading the view, typically from a nib
if(passedValue1){
    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

    NSObject * object = [prefs objectForKey:key];
    if(object != nil){
        NSUserDefaults *defults = [NSUserDefaults standardUserDefaults];
        [defults setObject:passedValue1 forKey:key];
        [defults synchronize];
    }
    else{
        NSUserDefaults *defults = [NSUserDefaults standardUserDefaults];

        NSInteger readScore=[[[NSUserDefaults standardUserDefaults] objectForKey:key] integerValue];
        NSInteger newValue=readScore+[passedValue1 integerValue];
        [defults setValue:[NSString stringWithFormat:@"%d",newValue] forKey:key];
        [defults synchronize];
    }
}
     label.text = [[NSUserDefaults standardUserDefaults]objectForKey:key];
       }

Why is this not working , the displayed value of the label is the originally passedValue1?

解决方案

once try this one ,

  NSUserDefaults *defaults=[NSUserDefaults standardUserDefaults];
    [defaults setObject:@"10" forKey:@"old value"];
    [defaults synchronize];

    int k=[[defaults objectForKey:@"old value"] intValue]+newValue;

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