This question already has answers here:
Animating UILabel Font Size Change
(9 answers)
Closed 6 years ago.
I have set my UILabel to scale text automatically to fit within the labels frame. During runtime I am changing the size of this frame to make space for things underneath, but I really want the size change to be animated, since the text jumps from one size to a smaller one, which doesn't look very good.
Is there any way to accomplish this?
To animate the height change use UIView.animateWithDuration. Here's an example animating the height change of a UILabel with a 2 second duration:
#IBOutlet weak var label: UILabel!
override func viewDidLoad() {
super.viewDidLoad()
let updatedHeight: CGFloat = 100.0
let updatedFrame = CGRect(origin:label.frame.origin,
size: CGSize(width:label.frame.width, height: updatedHeight))
UIView.animateWithDuration(2.0, animations: {
self.label.frame = updatedFrame
})
}
Related
The placeholder text does show the triple points to cut off the text.
The text doesn't even take half of the textfield width, and the three points are longer than the text. Is there a way to go inside the field and adjust the threshold to avoid the cutoff?
I do know the programatic way, and use that for the moment, to resize the placeholder tekst, till it fits.
let labelKeyPath: String = "_placeholderLabel"
var label : UILabel = self.Distance.value(forKeyPath: labelKeyPath) as! UILabel
label.adjustsFontSizeToFitWidth = true
label = self.FocalLength.value(forKeyPath: labelKeyPath) as! UILabel
label.adjustsFontSizeToFitWidth = true
Herby I do add some images of the current IB settings and results. Please keep adding points to let me show the current and future images embedded, thank you.
The IB view, settings and app result
Alternative you can create your own UITF subclass and override:
open func placeholderRect(forBounds bounds: CGRect) -> CGRect
You can customize the textfield to fix you issue. put this CustomTextField in your Storyboard textfield class type. here am setting minimum scaling factor to 0.3. that helps to fix the ...
class CustomTextField: UITextField {
override func layoutSubviews() {
super.layoutSubviews()
for subview in subviews {
if let label = subview as? UILabel {
label.minimumScaleFactor = 0.3
label.adjustsFontSizeToFitWidth = true
}
}
}
}
You should change Autolayouts Constraints with leading, center vertically with Distance and horizontal space with the Distance.
You can also wrap up text with resize the textfield using minimum font size.
In Swift, i have a UITextField on a table view cell, and when it's text becomes too long I would like the font size to decrease. I want to make it very clear that I am talking about a UITextField, not a UILabel or a UITextView. The reason I say this is because I have seen this question pop up several times and the answers were all based on UILabel instead of UITextField.
I hoped, that can be done in IB, where i did this settinngs of Min Font Size and ajust to fit, but this didn´t change anything:
Is there another way to resolve this?
extension UITextField {
internal func resizeText() {
if let text = self.text{
self.font = UIFont.systemFontOfSize(14)
let textString = text as NSString
var widthOfText = textString.sizeWithAttributes([NSFontAttributeName : self.font!]).width
var widthOfFrame = self.frame.size.width
// decrease font size until it fits
while widthOfFrame - 5 < widthOfText {
let fontSize = self.font!.pointSize
self.font = self.font?.fontWithSize(fontSize - 0.5)
widthOfText = textString.sizeWithAttributes([NSFontAttributeName : self.font!]).width
widthOfFrame = self.frame.size.width
}
}
}
}
Based on the answer I linked, I created an extension to UITextField that automatically resizes text - to have it properly resize the text each time, it needs to be called in a number of locations:
override func drawRect(rect: CGRect) (I haven't found a better spot to call this as you have to wait until its bounds are set and the TVC lifecycle gets confusing)
textField(textField: UITextField, shouldChangeCharactersInRange...
This question already has answers here:
How do I size a UITextView to its content?
(41 answers)
Closed 7 years ago.
I have an UITextView that loads different text depending on the route the user has taken in order to get to the view with the text on it.
How do I dynamically adjust the height of the UITextView depending on its content using Swift?
Setup your constraints so that the edges are pinned but allow the text view to grow vertically. Then set a height constraint (the value doesn't matter here). Create an #IBOutlet for the UITextView and the height constraint. Then we can dynamically change the height in code:
class ViewControler: UIViewController, UITextViewDelegate {
#IBOutlet weak var textView: UITextView!
#IBOutlet weak var textViewHeight: NSLayoutConstraint!
override func viewDidLoad() {
super.viewDidLoad()
self.textView.delegate = self
}
func textViewDidChange(textView: UITextView) {
let sizeToFitIn = CGSizeMake(self.textView.bounds.size.width, CGFloat(MAXFLOAT))
let newSize = self.textView.sizeThatFits(sizeToFitIn)
self.textViewHeight.constant = newSize.height
}
}
How can a textField be resized based on content while using auto-layout in an iOS application written in Swift?
The text field will resize as necessary to fit its content when the view loads as well as while the user is typing.
Ideally, the text field would stop resizing at a certain point, say, 6 lines, and become scrollable.
You have to use an UITextView instead of an UITextField.
Then, you can use the sizeThatFits method.
But first you have to know how high one line will be. You can get that information by using lineHeight:
var amountOfLinesToBeShown: CGFloat = 6
var maxHeight: CGFloat = yourTextview.font.lineHeight * amountOfLinesToBeShown
After that, just call the sizeThatFits method inside your viewDidLoad method and set the maxHeight (line * 6) as your textview height:
yourTextview.sizeThatFits(CGSizeMake(yourTextview.frame.size.width, maxHeight))
Swift 3
var textView : UITextView!
override func viewDidLoad() {
super.viewDidLoad()
textView = UITextView()
textView.sizeThatFits(CGSize(width: textView.frame.size.width, height: textView.frame.size.height))
}
I'm trying to have a UIViewController to display some text centered vertically in a UITextView. When app is launched, the text is aligned to the top. But if I try to select some text, the text would then move to the center vertically. It seems like setting contentOffset doesn't do anything at the first time, unless there's some action to trigger it to readjust the layout (like selecting some text in my scenario).
Also when I log the values of height, size, contentHeight and topCorrect, the values from the first call is the same as the second call. So I'm getting the same value but UITextView somehow is not responding to the contentOffset the very first time.
I even tried moving the logic to viewDidLayoutSubviews() and viewDidAppear(). I had the same result. So I don't think it's a problem of having the logic in the wrong place.
I think some people have success with it on iOS 7 and Obj-C. I'm trying get it running on iOS 8 and Swift.
Any suggestion or help would be very much appreciated.
class PageContentViewController : UIViewController {
#IBOutlet weak var textView: UITextView!
override func viewWillLayoutSubviews() {
super.viewWillLayoutSubviews()
self.textView.textContainerInset = UIEdgeInsetsMake(0, 16.0, 0, 16.0)
let height = self.textView.bounds.size.height
let size = CGSizeMake(self.textView.frame.width, CGFloat.max)
var contentHeight = self.textView.sizeThatFits(size).height
var topCorrect = (height - contentHeight * self.textView.zoomScale) / 2.0
topCorrect = topCorrect < 0.0 ? 0.0 : topCorrect;
self.textView.setContentOffset(CGPointMake(0, -topCorrect), animated: false)
}
}