CODEWITHSUNDEEP
iosuiviewswiftcgaffinetransform
Old Name
Old Name

Reputation: 273

Move coordinates of UIView to LLO with Swift

I would expect this code to move my newLabel from the upper left corner (ULO) to the lower left corner (LLO) but it doesn't! Apparently I need someone to hold my hand through the process of setting (0, 0) to LLO for a UIView. I've been through the documentation and read post after post on this forum but can't seem to make it happen. Disclaimer: I am trying to accomplish this in a playground in xCode 6 beta 2 so it possible it's a bug or not supported.

var newLabel = UILabel(frame: CGRectMake(0, 0, 150, 50))
newLabel.text = "This is a test"
newLabel.layer.borderWidth = 2
newLabel.textAlignment = NSTextAlignment.Center
newLabel.backgroundColor = UIColor(red: 0.5, green: 0.5, blue: 0.5, alpha: 0.8)

var myView = UIView(frame: CGRectMake(0, 0, 200, 100))
myView.layer.borderWidth = 2
myView.addSubview(newLabel)
myView.transform = CGAffineTransformMakeScale(1, -1)
myView.backgroundColor = UIColor(red: 0.8, green: 0, blue: 0, alpha: 0.8)

enter image description here

Upvotes: 1

Views: 1876

Answers (2)

Old Name
Old Name

Reputation: 273

To flip the UIView it has to be a subView of another view... My issue was I was trying to flip the mainView or baseView which apparently cant be done. This make since, since it needs a graphic space to be able to draw to. Below is the code achieving what I was looking for. Also of not I also had to "flip" my label as well to return it to it upright state (again this is logical).

var newLabel = UILabel(frame: CGRectMake(0, 0, 150, 50))
newLabel.transform = CGAffineTransformMakeScale(1, -1)
newLabel.text = "This is a test"
newLabel.layer.borderWidth = 2
newLabel.textAlignment = NSTextAlignment.Center
newLabel.backgroundColor = UIColor(red: 0.5, green: 0.5, blue: 0.5, alpha: 0.8)

var subView = UIView(frame: CGRectMake(50, 50, 200, 100))
subView.transform = CGAffineTransformMakeScale(1, -1)
subView.layer.borderWidth = 2
subView.addSubview(newLabel)
subView.backgroundColor = UIColor(red: 0.8, green: 0, blue: 0, alpha: 0.8)

var myView = UIView()
myView = UIView(frame: CGRectMake(0, 0, 300, 200))
//myView.transform = CGAffineTransformMakeScale(1, -1)
myView.layer.borderWidth = 2
myView.addSubview(subView)
myView.backgroundColor = UIColor(red: 0, green: 0.8, blue: 0, alpha: 0.8)

enter image description here

Thanks @Mohit for your input in helping me to find the solution.

Upvotes: 0

Mohit
Mohit

Reputation: 516

It seems like you haven't added Myview in main view try this code:--

     var newLabel = UILabel(frame: CGRectMake(0, 0, 150, 50))
    newLabel.text = "This is a test"
    newLabel.layer.borderWidth = 2
    newLabel.textAlignment = NSTextAlignment.Center
    newLabel.backgroundColor = UIColor(red: 0.5, green: 0.5, blue: 0.5, alpha: 0.8)

    var myView = UIView(frame: CGRectMake(0, 0, 200, 100))
    myView.layer.borderWidth = 2
    myView.addSubview(newLabel)
    myView.transform = CGAffineTransformMakeScale(1, -1)
    myView.backgroundColor = UIColor(red: 0.8, green: 0, blue: 0, alpha: 0.8)
    self.view.addSubview(myView);

Upvotes: 1

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