How to align text horizontally & vertically in UITextView? I want align text in UITextView with horizontal alignment & vertical alignment. Is there any custom way? Please help me out.....
As far as I know there is no built in method for vertical alignment of a UITextView. However, by updating the the contentOffset you can get vertically centered text:
[textView setTextAlignment:NSTextAlignmentCenter];
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
[textView addObserver:self forKeyPath:@"contentSize" options:(NSKeyValueObservingOptionNew) context:NULL];
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
[textView removeObserver:self forKeyPath:@"contentSize"];
}
-(void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{
UITextView *tv = object;
CGFloat topCorrect = ([tv bounds].size.height - [tv contentSize].height * [tv zoomScale])/2.0;
topCorrect = ( topCorrect < 0.0 ? 0.0 : topCorrect );
tv.contentOffset = (CGPoint){.x = 0, .y = -topCorrect};
}
This is a Swift solution and is different now since content insets and offsets have changed slightly. This solution works in Xcode 7 beta 6.
override func viewWillAppear(animated: Bool) {
super.viewWillAppear(animated)
textView.addObserver(self, forKeyPath: "contentSize", options: NSKeyValueObservingOptions.New, context: nil)
}
override func viewWillDisappear(animated: Bool) {
super.viewWillDisappear(animated)
textView.removeObserver(self, forKeyPath: "contentSize")
}
Apple has changed how content offsets and insets work this slightly modified solution is now required to set the top on the content inset instead of the offset.
/// Force the text in a UITextView to always center itself.
override func observeValueForKeyPath(keyPath: String?, ofObject object: AnyObject?, change: [String : AnyObject]?, context: UnsafeMutablePointer<Void>) {
let textView = object as! UITextView
var topCorrect = (textView.bounds.size.height - textView.contentSize.height * textView.zoomScale) / 2
topCorrect = topCorrect < 0.0 ? 0.0 : topCorrect;
textView.contentInset.top = topCorrect
}
Vertically aligning middle with Swift:
In viewDidLoad:
textField.addObserver(self, forKeyPath: "contentSize", options: NSKeyValueObservingOptions.New, context: nil)
Then somewhere else in your view controller:
override func observeValueForKeyPath(keyPath: String, ofObject object: AnyObject, change: [NSObject : AnyObject], context: UnsafeMutablePointer<Void>) {
var topCorrect : CGFloat = (textField.frame.height - textField.contentSize.height);
topCorrect = topCorrect < 0.0 ? 0.0 : topCorrect / 2
textField.contentOffset = CGPoint(x: 0, y: -topCorrect)
}
where textField is wired up to the actual text field in your view.
You should provide the context on what you mean to do when you want to change the horizontal and vertical alignment,
The UITextview has a container and a frame property that you can align with another UITextview/ Imageview, etc. The frame property has an origin and a size that you can modify to align your views.
The text within the UITextview has a property called the textalignment which you can set to NSTextAlignmentLeft, NSTextAlignmentJustified, As suggested, you may also adjust the content offset property of the container but I find that adjusting the frame is more straight forward.
