保留随机视图之间的 UILabel 值
我正在为 iPhone 制作一个基于视图的测验应用程序，玩家在回答问题时会在三个不同的视图之间随机切换。当回答正确时他们会得到+1，当点击错误答案时他们会得到-1。但是回答完问题后，当您进入新的随机视图时，我需要 UILabel 来显示上一个视图的分数。我该怎么做？
这是我的代码：
ViewController.h
@interface ViewController : UIViewController {
IBOutlet UILabel *labelQuestion;
IBOutlet UILabel *labelAnswer1;
IBOutlet UILabel *labelAnswer2;
IBOutlet UILabel *labelAnswer3;
IBOutlet UILabel *labelScore;
int score;
}
@property (nonatomic, retain) IBOutlet UILabel *labelScore;
@property (nonatomic) int score;
ViewController.m
@synthesize labelScore;
@synthesize score;
-(IBAction)CorrectAnswer; {
score = score +1;
labelScore.text = [NSString stringWithFormat:@"%i", score];
}
-(IBAction)WrongAnswer; {
score = score -1;
labelScore.text = [NSString stringWithFormat:@"%i", score];
}
I'm making a view based quiz app for the iPhone where the player is going randomly between three different views when answering the questions. They get +1 when answering correct and -1 when tapping the wrong answer. But after answering the question, when you go to the new random view, I need the UILabel to show the score from the previous view. How do I do that?
Here is my code:
ViewController.h
@interface ViewController : UIViewController {
IBOutlet UILabel *labelQuestion;
IBOutlet UILabel *labelAnswer1;
IBOutlet UILabel *labelAnswer2;
IBOutlet UILabel *labelAnswer3;
IBOutlet UILabel *labelScore;
int score;
}
@property (nonatomic, retain) IBOutlet UILabel *labelScore;
@property (nonatomic) int score;
ViewController.m
@synthesize labelScore;
@synthesize score;
-(IBAction)CorrectAnswer; {
score = score +1;
labelScore.text = [NSString stringWithFormat:@"%i", score];
}
-(IBAction)WrongAnswer; {
score = score -1;
labelScore.text = [NSString stringWithFormat:@"%i", score];
}
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使变量 Score 全局化，即在您的 AppDelegate 中定义它，您可以在整个应用程序中访问它。
Make the variable score global i.e. define this in your
AppDelegateand you can access it throughout your application.最快但肮脏的方法是将其存储在应用程序委托中..如果您希望它在应用程序启动之间持续存在，请将其存储在用户默认值中..
但正如我所说，这很脏..
the quickest but dirty way is to store it in app delegate.. and if you want it to persist between app launches, store it in user defaults..
but as i said this is dirty..
由于它们是属性，因此当您创建下一个视图时，您可以将标签的文本设置为当前视图的文本，并将分数设置为当前视图的文本。
As they're properties, when you create the next view you can set the label's text to the current view's text and the score to the current view's.