Question

每当我的游戏中的文字发生变化（UILabel）时，它会将我的UIImageView（一个正在跑步的人）重置到起始位置（屏幕左侧）。

它在某种意义上几乎可以作为视图控制器重置......不确定原因。使用计时器更新所有整数和变量，但是一旦我尝试更改实际文本，所有内容都会重置为起始位置。

以下是我更新标签的NSTimer：

-(void)updateLabels{
//update lightning strikes label
strikesLeftDisplay=@"Strikes Left: ";
strikesLeftDisplay=[strikesLeftDisplay stringByAppendingString:[NSString stringWithFormat: @"%d", strikesLeft]];
lblLeft.text=strikesLeftDisplay;
 }

这是我的onDidLoad：

- (void)viewDidLoad {
currentScreenX=self.view.frame.size.width;
currentScreenY=self.view.frame.size.height;

currentLevel=1;
runningSpeed=7;
lightningSpeed=0.023;
runnerImageNumber=0;
strikesLeft=3;

cloudImage.hidden=YES;
boltImage.hidden=YES;

runningMovement=[NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(startRunning) userInfo:nil repeats:YES];

labelScanner=[NSTimer scheduledTimerWithTimeInterval:0.05 target:self selector:@selector(updateLabels) userInfo:nil repeats:YES];



[super viewDidLoad];

 }

最后，这是我的startRunning方法：

 - (void)startRunning{
if(livesLeft==0){[self endGame];}

manX=man.frame.origin.x;
manY=man.frame.origin.y;

if([direction isEqualToString:@"left"] && touchX < (manX+20)){
    man.center=CGPointMake(man.center.x - runningSpeed,man.center.y);
}else if([direction isEqualToString:@"right"] && touchX > (manX+22)){
    man.center=CGPointMake(man.center.x + runningSpeed,man.center.y);
}
else{
    direction=@"0";
}




//animate runner
if ([direction isEqualToString:@"right"]){
    if(runnerImageNumber==1){UIImage *image=[UIImage imageNamed:@"run1.png"];[man setImage:image];}
    if(runnerImageNumber==2){UIImage *image=[UIImage imageNamed:@"run2.png"];[man setImage:image];}
    if(runnerImageNumber==3){UIImage *image=[UIImage imageNamed:@"run3.png"];[man setImage:image];}
    if(runnerImageNumber==4){UIImage *image=[UIImage imageNamed:@"run4.png"];[man setImage:image];}
    if(runnerImageNumber==5){UIImage *image=[UIImage imageNamed:@"run5.png"];[man setImage:image];}
    if(runnerImageNumber==6){UIImage *image=[UIImage imageNamed:@"run6.png"];[man setImage:image];}
    if(runnerImageNumber==7){UIImage *image=[UIImage imageNamed:@"run7.png"];[man setImage:image];}
    if(runnerImageNumber==8){UIImage *image=[UIImage imageNamed:@"run8.png"];[man setImage:image];}
    if(runnerImageNumber==9){UIImage *image=[UIImage imageNamed:@"run9.png"];[man setImage:image];}
    runnerImageNumber++;
    if(runnerImageNumber==9){runnerImageNumber=1;}
}
if ([direction isEqualToString:@"left"]){
    if(runnerImageNumber==1){UIImage *image=[UIImage imageNamed:@"run10.png"];[man setImage:image];}
    if(runnerImageNumber==2){UIImage *image=[UIImage imageNamed:@"run11.png"];[man setImage:image];}
    if(runnerImageNumber==3){UIImage *image=[UIImage imageNamed:@"run12.png"];[man setImage:image];}
    if(runnerImageNumber==4){UIImage *image=[UIImage imageNamed:@"run13.png"];[man setImage:image];}
    if(runnerImageNumber==5){UIImage *image=[UIImage imageNamed:@"run14.png"];[man setImage:image];}
    if(runnerImageNumber==6){UIImage *image=[UIImage imageNamed:@"run15.png"];[man setImage:image];}
    if(runnerImageNumber==7){UIImage *image=[UIImage imageNamed:@"run16.png"];[man setImage:image];}
    if(runnerImageNumber==8){UIImage *image=[UIImage imageNamed:@"run17.png"];[man setImage:image];}
    if(runnerImageNumber==9){UIImage *image=[UIImage imageNamed:@"run18.png"];[man setImage:image];}
    runnerImageNumber++;
    if(runnerImageNumber==9){runnerImageNumber=1;}
}






}

Answer 1

我遇到了同样的问题。确保在Interface Builder Document中使用自动布局复选标记是UNCHECKED！这解决了我的问题。希望这会有所帮助。

Answer 2

通常你会看到这种类型的东西，因为你直接设置了视图的框架（或中心或bounds.size），但你的应用程序使用自动布局。

当您更改标签的文本时，标签会将自身标记为需要布局。这使得自动布局运行并根据视图的约束设置视图的帧，撤消您对这些视图的帧所做的任何更改。

不需要直接设置man.center，而是需要修改控制人员X位置的约束常量。如果您在xib或情节提要板中创建了约束，则可以将约束连接到插座（可能在视图控制器中）以访问它。

你可能最好为你的游戏切换到SpriteKit。

更新UILabel会在xCode iOS8中重置我的视图

2 个答案: