I have a superview which contains a ImageView
, a testView
, and some buttons. I created a UIView
which contains ImageView2
and a removebutton
. When I add UIView
to UIImageView
, the contents of UIView
are not in the frame of UIView
. Because of that, I cannot apply pan gesture recognizer. I have tried to apply constraints and to change the frame and centre of ImageView2
.
我有一个包含ImageView、testView和一些按钮的超视图。我创建了一个包含ImageView2和removebutton的UIView。当我向UIImageView添加UIView时,UIView的内容不在UIView的框架内。正因为如此,我无法应用pan手势识别器。我尝试应用约束,并改变ImageView2的框架和中心。
Below is the code I am using to create the above mentioned UIView
. How do I ensure that the contents of the UIView
are visible in the frame of the UIView
?
下面是我用来创建上面提到的UIView的代码。如何确保UIView的内容在UIView的框架中可见?
let rect = CGRect(x: self.imageView.center.x-30, y: self.imageView.center.y-30, width: 80, height: 80)
testview = UIView(frame: rect)
testview.layer.cornerRadius = testview.frame.width/2
testview.backgroundColor = UIColor.blackColor()
testview.clipsToBounds = true
imageView2 = UIImageView(frame: CGRect(x: testview.frame.minX+10, y: testview.frame.minY+10, width: 60, height: 60))
let rect2 = CGRect(x: self.testview.frame.maxX-17, y: self.testview.frame.minY, width: 20, height: 20)
removeButton = UIButton(frame: rect2)
removeButton.layer.cornerRadius = removeButton.frame.width/2
removeButton.backgroundColor = UIColor.blackColor()
removeButton.clipsToBounds = true
imageView2.layer.cornerRadius = imageView2.frame.width/2
imageView2.userInteractionEnabled = true
imageView2.clipsToBounds = true
testview.alpha = 0.3
imageView2.center = testview.center
imageView2.center = testview.center
testview.addSubview(imageView2)
testview.addSubview(removeButton)
testview.bringSubviewToFront(imageView2)
imageView.addSubview(testview)
1 个解决方案
#1
1
The problem is that lines like this do not do what you think:
问题是,像这样的线条不能做你认为的:
let rect = CGRect(x: self.imageView.center.x-30, y: self.imageView.center.y-30, width: 80, height: 80)
// ... and ...
imageView2.center = testview.center
The center
of a view is in its frame
coordinates - it has to do with how the view is placed in its superview. But the position of a subview must be described in terms of its superviews bounds
, not its frame
. Its bounds
are its internal coordinates, which is what you want.
视图的中心在它的帧坐标中——它与视图如何放在它的父视图中有关。但是子视图的位置必须根据父视图的边界而不是它的框架来描述。它的边界是它的内部坐标,这是你想要的。
Let's take the simplest case: how to center a subview in a superview. This is not the way:
让我们以最简单的情况为例:如何将子视图居中于父视图中。这不是方法:
imageView2.center = testview.center
You see the problem? testview.center
is where testview
is located in its superview; it is not the internal center of testview
, which is what you want. The internal center of testview
comes from its bounds
. This is the way:
你看这个问题?testview。中心是testview位于父视图中的位置;它不是testview的内部中心,这正是您想要的。testview的内部中心来自它的边界。这是道:
let c = CGPointMake(testview.bounds.midX, testview.bounds.midY)
imageView2.center = c
#1
1
The problem is that lines like this do not do what you think:
问题是,像这样的线条不能做你认为的:
let rect = CGRect(x: self.imageView.center.x-30, y: self.imageView.center.y-30, width: 80, height: 80)
// ... and ...
imageView2.center = testview.center
The center
of a view is in its frame
coordinates - it has to do with how the view is placed in its superview. But the position of a subview must be described in terms of its superviews bounds
, not its frame
. Its bounds
are its internal coordinates, which is what you want.
视图的中心在它的帧坐标中——它与视图如何放在它的父视图中有关。但是子视图的位置必须根据父视图的边界而不是它的框架来描述。它的边界是它的内部坐标,这是你想要的。
Let's take the simplest case: how to center a subview in a superview. This is not the way:
让我们以最简单的情况为例:如何将子视图居中于父视图中。这不是方法:
imageView2.center = testview.center
You see the problem? testview.center
is where testview
is located in its superview; it is not the internal center of testview
, which is what you want. The internal center of testview
comes from its bounds
. This is the way:
你看这个问题?testview。中心是testview位于父视图中的位置;它不是testview的内部中心,这正是您想要的。testview的内部中心来自它的边界。这是道:
let c = CGPointMake(testview.bounds.midX, testview.bounds.midY)
imageView2.center = c