UITextField Disapearing

Question

I have a UITextField which animates onto the view controller (moves in from the right hand side onto the view) when I press a button. However, when I press on the UITextField or any other view, the UITextField disappears. How can I stop the UITextField from disappearing. I am using the following code:

@IBAction func joinCircleButton(sender: AnyObject) {
    let button = sender as UIButton
    joinTextField.frame.origin.x=500
    joinTextField.frame.origin.y=100
    if (button.frame.origin.x - 75>0){
    UIView.animateWithDuration(0.5, animations:{
        button.frame = CGRectMake(button.frame.origin.x - 125, button.frame.origin.y,button.frame.size.width, button.frame.size.height)
        button.transform = CGAffineTransformMakeScale(0.5, 0.5);
        self.joinTextField.frame=CGRectMake(self.joinTextField.frame.origin.x - 325, self.joinTextField.frame.origin.y,self.joinTextField.frame.size.width, self.joinTextField.frame.size.height)

    })
    }
}
override func viewDidLayoutSubviews(){
    joinTextField.center = CGPointMake(joinTextField.frame.origin.x-500, joinTextField.frame.origin.y)


}

Are you using auto layout? If so, you shouldn't be setting any frames to move the button. When the view needs to redraw itself (like when you start editing your text field), the button will move back to the position defined by its constraints. — rdelmar, Jan 05 '15 at 02:12
@rdelmar I removed the auto-layout on the button and text field, but am still using it for other things in the view? Is that a problem? — StevenZ, Jan 05 '15 at 02:15
You can't do that if all the views are made in the same storyboard -- it's either on or off for the whole storyboard (or a whole xib file). If you don't add constraints yourself, the system adds them for you. — rdelmar, Jan 05 '15 at 02:18
@rdelmar I have removed all constraints from the ViewController in the storyboard, but other `viewControllers` in the storyboard are using autolayout — StevenZ, Jan 05 '15 at 02:21
As I said, you can't do that. The system will add the constraints for you. Click on one of your views, and look at the size inspector -- it will have a message saying what constraints the system will add. — rdelmar, Jan 05 '15 at 02:22
You learn to use auto layout. Make IBOutlets to any constraints you need to modify, and modify their constant values in code to do the animation. — rdelmar, Jan 05 '15 at 02:25
Let us [continue this discussion in chat](http://chat.stackoverflow.com/rooms/68192/discussion-between-rdelmar-and-stevenr). — rdelmar, Jan 05 '15 at 02:30

score 0 · Accepted Answer · answered Jan 05 '15 at 01:36

0

If you're using an iPhone simulator, try using 50 instead of 500 as the screen width is small and your text field is thus displayed off screen

joinTextField.frame.origin.x=**50**
joinTextField.frame.origin.y=100

override func viewDidLayoutSubviews(){
    joinTextField.center = CGPointMake(joinTextField.frame.origin.x-**50**, joinTextField.frame.origin.y)
}

answered Jan 05 '15 at 01:36

Tony Swiftguy

444
3
3

I changed the `joinTextField.frame.origin.x-**50**` part. What should I do with the part above it? – StevenZ Jan 05 '15 at 01:39
And why does the textField still move. – StevenZ Jan 05 '15 at 01:45
I can help you via Skype if you want me to. See my profile. – Tony Swiftguy Jan 05 '15 at 01:55
It's on: godostartupnow – Tony Swiftguy Jan 05 '15 at 02:05
I have sent you a `addContact` request. Check your skype account. – StevenZ Jan 05 '15 at 02:06
Saw none; what's yours? – Tony Swiftguy Jan 05 '15 at 02:14

Aviel Gross · Answer 2 · 2015-01-05T05:55:31.927

Auto layout won't let you change frame of a view. Instead, you suppose to change the constraints and call setNeedsUpdateConstraints(). If you DO need to perform an animation that temporary changes the position of the view, you can use CGAffineTransform and specifically CGAffineTransformMakeTranslate(), giving tx and ty representing "by how many points you wish to move the view". Since you also use transform to animate scale in your code, you can use CGAffineTransformConcat to "merge" the scale and transform commands into one that you can set to the view.

You're animation method should look something like this:

UIView.animateWithDuration(0.5) {
    let trans = CGAffineTransformMakeTranslation(-125, 0)
    let scale = CGAffineTransformMakeScale(0.5, 0.5)
    button.transform = CGAffineTransformConcat(trans, scale)
    self.joinTextField.transform = CGAffineTransformMakeTranslation(-325, 0)
}

Learn more about CGAffineTransform in Apple Docs

Regarding the rest of the code - you may still get the frame to check it in your if, but you have to change the part where you change the frame to using transform translate

So which method would I need to use to keep the textField from disappearing. Thank you, I'm new to IOS. — StevenZ, Jan 05 '15 at 05:32
This is what I have: @IBAction func joinCircleButton(sender: AnyObject) { let button = sender as UIButton UIView.animateWithDuration(0.5) { let trans = CGAffineTransformMakeTranslation(-125, 0) let scale = CGAffineTransformMakeScale(0.5, 0.5) button.transform = CGAffineTransformConcat(trans, scale) self.joinTextField.transform = CGAffineTransformMakeTranslation(-25, -50) } } — StevenZ, Jan 05 '15 at 05:53
But the textField still moves when pressed, but the button stays put. — StevenZ, Jan 05 '15 at 05:54

UITextField Disapearing

2 Answers2