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我在 iOS 中工作 CALayer 在 myView 中添加了一个子层，并尝试通过触摸开始获取触摸事件，但我在绘制图层的位置没有收到触摸事件，如果有问题，请帮助我纠正它。

UIView *myView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
myView.backgroundColor = [UIColor whiteColor];

magicButton_ = [UIButton buttonWithType:UIButtonTypeRoundedRect];
magicButton_.frame = CGRectMake(10., 10., 300., 44.);
[magicButton_ setTitle:@"Invoke Magic!" forState:UIControlStateNormal];
[magicButton_ addTarget:self action:@selector(toggleMoney:) forControlEvents:UIControlEventTouchUpInside];
[myView addSubview:magicButton_];

simpleLayer_ = [[CALayer alloc]init];


simpleLayer_.bounds = CGRectMake(0., 0., 150., 20.);
simpleLayer_.position = CGPointMake((myView.center.x),(myView.center.y));
simpleLayer_.name = @"redlayer";
simpleLayer_.delegate = self;
simpleLayer_.backgroundColor = [[UIColor redColor]CGColor];
[myView.layer addSublayer:simpleLayer_];
self.view = myView;

-(void)touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event {
    CGPoint location = [[touches anyObject] locationInView:self.view];
    CALayer *hitLayer = [self.view.layer hitTest:[self.view convertPoint:location             fromView:nil]];

    NSLog(@"Location %f  %f",location.x,location.y);
    [self displayInfo:hitLayer.name];
}


-(void)displayInfo:(NSString *)nameOfLayer
{
   NSLog(@"%@",nameOfLayer);
}

2013-10-14 13:13:37.374 MyLayerProj[1750:11303] (null)
2013-10-14 13:13:38.468 MyLayerProj[1750:11303] Location 87.000000  269.000000
2013-10-14 13:13:38.469 MyLayerProj[1750:11303] (null)
2013-10-14 13:13:39.239 MyLayerProj[1750:11303] Location 112.000000  278.000000
2013-10-14 13:13:39.240 MyLayerProj[1750:11303] redlayer
2013-10-14 13:13:40.479 MyLayerProj[1750:11303] Location 119.000000  278.000000

我还包括了运行代码时得到的日志。

4

1 回答 1

1

在[self.view convertPoint:location fromView:nil]您的调用中的-[CALayer hitTest]意思是“location从窗口的坐标空间转换为self.view”的坐标空间。

但是，location已经在视图的坐标空间中，因为您从传递self.view到-[UITouch locationInView:].

于 2013-10-14T08:25:14.550 回答