在我的应用程序中,每 2 秒通过 NSTimer 调用一个方法 (addCoinTarget)。我想让应用程序在调用 UIView(在本例中为 Coin)时执行 NSLog。但是,无论何时触摸屏幕,即使它不在 Coin 对象上,应用程序都会崩溃并出现以下错误:
error: memory read failed for 0x42200000
这是创建 Coin 对象的方法:
-(void)addCoinTarget {
Coin *coinTarget = [[Coin alloc]initWithFrame:CGRectMake(-20, -20, 27, 40)];
[self.view addSubview:coinTarget];
// Determine where to spawn the coin along the Y axis
int minYc = coinTarget.frame.size.width/2;
int maxYc = screen.size.width - coinTarget.frame.size.width/2;
int rangeYc = maxYc - minYc;
int actualYc = (arc4random() % rangeYc) + minYc;
// Determine speed of the target
int minDurationc = 2.0;
int maxDurationc = 4.0;
int rangeDurationc = maxDurationc - minDurationc;
int actualDurationc = (arc4random() % rangeDurationc) + minDurationc;
theAnimation=[CABasicAnimation animationWithKeyPath"transform.translation"];
theAnimation.duration = 3.0;
theAnimation.repeatCount=1.0;
theAnimation.autoreverses=NO;
[theAnimation setFromValue:[NSValue valueWithCGRect:CGRectMake(screen.size.height + (coinTarget.frame.size.height/2), actualYc, 27, 40)]];
[theAnimation setToValue:[NSValue valueWithCGRect:CGRectMake(-50, actualYc, 27, 40)]];
theAnimation.delegate = self;
[CATransaction setCompletionBlock:^{
[coinTarget removeFromSuperview];
}];
[coinTarget.layer addAnimation:theAnimation forKey"animations"];
另外,这是我到目前为止的触摸代码:
- (void)touchesBeganNSSet *)touches withEventUIEvent *)event {
UITouch *touch = [touches anyObject];
CGPoint location = [touch locationInView:[touch view]];
NSLog(@"touched");
}
我做错了什么?
被触摸的 View 的引用计数为零,因此它已被释放。
关于触摸屏幕时ios应用程序崩溃,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/22391893/
欢迎光临 OStack程序员社区-中国程序员成长平台 (https://ostack.cn/) | Powered by Discuz! X3.4 |