Question

我正在Xcode中制作游戏，其中包括每个级别的评分系统。在这里，我有一些使用委托获得NSString（passedValue1）的代码。

代表委托代码：

LevelCompleteLevel1

·H

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

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

的.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viewcontroller标签中的值发送给另一个view controller，我发送的值称为passedValue1

我发送了需要显示的值并保存在ViewController

中

ViewController

·H

@interface ViewController : UIViewController{

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

@end

的.m

首先我...... @synthesize passedValue1;

然后我添加代码以接收viewDidLoad中的值并在UILabel

中显示我的值

- (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"];
}

显示值I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，我想将新的passedValue1值添加到当前保存的值...

例如：

说我玩我的等级并得到10分。然后保存该值并重播我的等级。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.然后我想让我的代码将它们加在一起，给我一个30的值。

提前致谢。

修改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"];

}

Answer 1

从userDefaults中读取，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];

然后再保存：

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

编辑： * 你在labelKey中输入了一个拼写错误，这就是为什么我将它存储在一个字符串中并使用它，所以即使错误你也可能不会出现任何拼写错误 *

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];
}

objective - C：在Xcode中添加以前保存的NSUserDefaults

1 个答案: