Programmatically change the height and width of a UIImageView Xcode Swift

问题

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)

But I need the height to not be a static number. Something like image = (0,0, frame.height * 0.2, 50)

Any suggestions?

回答1:

The accepted answer in Swift 3:

let screenSize: CGRect = UIScreen.main.bounds
image.frame = CGRect(x: 0, y: 0, width: 50, height: screenSize.height * 0.2)

回答2:

let screenSize: CGRect = UIScreen.mainScreen().bounds
image.frame = CGRectMake(0,0, screenSize.height * 0.2, 50)

回答3:

Using autoview

image.heightAnchor.constraint(equalToConstant: CGFloat(8)).isActive = true

回答4:

Hey i figured it out shortly after. For some reason I was just having a brain fart.

image.frame = CGRectMake(0 , 0, self.view.frame.width, self.view.frame.height * 0.2)

回答5:

u can use this code

var imageView = UIImageView(image: UIImage(name:"imageName"));
imageView.frame = CGrectMake(x,y imageView.frame.width*0.2,50);

or

var imageView = UIImageView(frame:CGrectMake(x,y, self.view.frame.size.width *0.2, 50)

回答6:

imageView is a subview of the main view. It works this way

image.frame = CGRectMake(0 , 0, super.view.frame.width, super.view.frame.height * 0.2)

来源：https://stackoverflow.com/questions/31345903/programmatically-change-the-height-and-width-of-a-uiimageview-xcode-swift