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我正在用 Xcode 制作一个游戏，其中包括每个级别的评分系统。在这里，我有一些通过使用委托获得NSString( ) 的代码。passedValue1

这是委托的代码：

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];

在.m我将当前标签中的一个值发送viewcontroller到另一个view controller我发送的值被称为passedValue1

一旦我发送了我需要显示的值并保存在我的ViewController

ViewController

。H

@interface ViewController : UIViewController{

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

@end

.m

首先我...@synthesize passedValue1;

然后我添加代码以接收我的值viewDidLoad并将我的值显示在UILabel

- (void)viewDidLoad
{ 
    if(passedValue1){
        label.text = passedValue1;

        NSUserDefaults *defults = [NSUserDefaults standardUserDefaults];
        [defults setObject:label.text forKey:@"labelkey"];
        [defults synchronize];
    }
    label.text = [[NSUserDefaults standardUserDefaults]objectForKey:@"labelkey"];
}

一旦我显示了值，我就使用NSUserDefault. 但是，一旦我重玩了我的游戏并获得了另一个得分值，我想将新passedValue1值添加到当前保存的值中......

例如：

假设我玩了我的关卡，我得到了 10 的得分值。然后保存该值并重播我的关卡。然后我想获取保存的值并将其添加到我刚刚得分的值中。所以这就是说我得分的第二个值是 20。然后我希望我的代码将它们加在一起并给我一个 30 的值。

提前致谢。

编辑 这是我正在使用的代码：

- (void)viewDidLoad
{ 


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

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

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

}
4

1 回答 1

3

从 userDefaults 读取，添加您当前的分数：

//assuming passedValue1 is your new score

NSInteger readScore=[[NSUserDefaults standardUserDefaults] objectForKey:@"labelkey"] integerValue];
NSInteger newValue=readScore+[passedValue1 integerValue];

然后再次保存：

NSUserDefaults *defults = [NSUserDefaults standardUserDefaults];
[defults setObject:[NSString stringWithFormat:@"%d",newValue] forKey:@"labelkey"];
[defults synchronize];

编辑： *您在 labelKey 中有错字，这就是为什么我将它存储在一个字符串中并使用它，这样即使是错误的，您也可能不会出现任何错字错误。*

将您的方法更改为：

- (void)viewDidLoad{ 
    [super viewDidLoad];
    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];
}
于 2013-04-03T12:34:59.960 回答