ios 以编程方式更改 UIImageView Xcode Swift 的高度和宽度
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Programmatically change the height and width of a UIImageView Xcode Swift
提问by Lucas Azzopardi
Hey for some reason I am struggling with trying to set the height and width of one of my image views. I want to set it so the height only goes for 20% of my screen. I know to regularly set it you can do things like: image = (0,0,50,50)
嘿，出于某种原因，我正在努力尝试设置我的一个图像视图的高度和宽度。我想将其设置为高度仅占屏幕的 20%。我知道要定期设置它，您可以执行以下操作：image = (0,0,50,50)
But I need the height to not be a static number. Something like image = (0,0, frame.height * 0.2, 50)
但我需要高度不是一个静态数字。像 image = (0,0, frame.height * 0.2, 50)
Any suggestions?
有什么建议？
回答by user1333394
The accepted answer in Swift 3:
Swift 3 中接受的答案：
let screenSize: CGRect = UIScreen.main.bounds
image.frame = CGRect(x: 0, y: 0, width: 50, height: screenSize.height * 0.2)
回答by Aggressor
let screenSize: CGRect = UIScreen.mainScreen().bounds
image.frame = CGRectMake(0,0, screenSize.height * 0.2, 50)
回答by mamu
Using autoview
使用自动查看
image.heightAnchor.constraint(equalToConstant: CGFloat(8)).isActive = true
回答by Lucas Azzopardi
Hey i figured it out shortly after. For some reason I was just having a brain fart.
嘿，我很快就想通了。出于某种原因，我只是在放屁。
image.frame = CGRectMake(0 , 0, self.view.frame.width, self.view.frame.height * 0.2)
回答by Konstantin Kryzhanovsky
u can use this code
你可以使用这个代码
var imageView = UIImageView(image: UIImage(name:"imageName"));
imageView.frame = CGrectMake(x,y imageView.frame.width*0.2,50);
or
或者
var imageView = UIImageView(frame:CGrectMake(x,y, self.view.frame.size.width *0.2, 50)
回答by Gasper J.
A faster / alternative way to change the height and/or width of a UIViewis by setting its width/height through frame.size:
更改 a 的高度和/或宽度的更快/替代方法UIView是将其宽度/高度设置为frame.size：
let neededHeight = UIScreen.main.bounds * 0.2
yourView.frame.size.height = neededHeight
回答by Dennis
imageView is a subview of the main view. It works this way
imageView 是主视图的子视图。它是这样工作的
image.frame = CGRectMake(0 , 0, super.view.frame.width, super.view.frame.height * 0.2)
