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我的视图控制器仅支持横向。我在主视图中添加了一个白色视图(whiteView - xib 中的 IBOutlet),并在 whiteview 中添加了一个蓝色 CALayer(blueLayer - 类中的属性)。当我在此视图控制器上运行 hitTest 时,它在应用程序窗口右侧的触摸返回不正确的结果,左侧一切正常。即使当前方向是横向,应用程序也好像在纵向模式下运行。在纵向模式下一切正常。

下面是代码。在横向中,每次向右触摸都会返回“在主视图中触摸”。我需要做什么才能使其在横向中正常工作?

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.blueLayer = [[CALayer alloc] init];
    CGRect frame = self.whiteView.frame;
    self.blueLayer.frame = CGRectMake(20.0, 20.0, frame.size.width-40.0, frame.size.height - 40.0f);
    self.blueLayer.backgroundColor = [UIColor blueColor].CGColor;
    [self.whiteView.layer addSublayer:self.blueLayer];
}

- (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{

    CGPoint touchPoint = [[touches anyObject] locationInView:self.view];
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"" message:@"Touch in main view" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil, nil];
    CALayer *touchedLayer = [self.view.layer hitTest:touchPoint];

    if(touchedLayer == self.blueLayer){
        alertView.message = @"Touch in blue view";
    }
    else if (touchedLayer == self.whiteView.layer){
        alertView.message = @"Touch in white view";
    }
    else
        alertView.message = @"Touch in main view";

    [alertView show];
}
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1 回答 1

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它与方向无关。根据苹果文档,“hitTest 返回图层最远的后代”。兄弟姐妹按从上到下的顺序进行搜索。接触点在接收者超层的坐标系中。因此,在您获得 touchPoint 后立即添加此行。IE

CGPoint touchPoint = [[touches anyObject] locationInView:self.view];
touchPoint = [self.view.layer convertPoint:touchPoint toLayer:self.view.layer.superlayer];
...........
于 2013-08-29T17:39:02.150 回答