UITextView not Scrolling in tvOS

问题:

I have a UITextView in my TV app, when i try to make it focusable then the UI is not making it focusable and i am unable to scroll it. I read some questions about it and some says that its a known issue and we should use storyboards. Actually i am using storyboards but still unable to get this to work. I have also tried to make it selectable, scrollEnabled and userInteractionEnabled and then finally also tried this line of code but none of them is working.

descriptionLbl.panGestureRecognizer.allowedTouchTypes = [NSNumber(integer: UITouchType.Direct.rawValue)]

I also tried to print bounds abd contentSize of the UITextView and here is the log

Content Size (740.0, 914.0)
Bounds (25.0, 0.0, 740.0, 561.0)

Here is my code can some body help me

@IBOutlet weak var descriptionLbl: UITextView!
var currentModel : Model?


override func viewDidLoad() {
    super.viewDidLoad()

    descriptionLbl.selectable = true
    descriptionLbl.scrollEnabled = true
    descriptionLbl.userInteractionEnabled = true


    descriptionLbl.panGestureRecognizer.allowedTouchTypes = [NSNumber(integer: UITouchType.Direct.rawValue)]


    descriptionLbl.text = (currentModel?.description)! + (currentModel?.description)! + (currentModel?.description)!
    descriptionLbl?.contentInset = UIEdgeInsets(top: 0.0, left: -25.0, bottom: 0.0, right: 0.0);


}

i guess i should not be doing these many tricks but it is not working in any way. The focus is actually coming to UITextView but it does not scroll. Any ideas?

回答1:

I believe you want Indirect, not Direct touches. Here is how I set up my focusable, scrollable UITextView:

self.selectable = YES;
self.userInteractionEnabled = YES;
self.panGestureRecognizer.allowedTouchTypes = @[@(UITouchTypeIndirect)];

回答2:

Here is what worked for me, in Swift 2.1:

myTextView.userInteractionEnabled = true
myTextView.selectable = true
myTextView.scrollEnabled = true
myTextView.panGestureRecognizer.allowedTouchTypes = [UITouchType.Indirect.rawValue]

Hope it helps.

回答3:

Here's what worked for me in Swift 3.0.1, based on the previous answers:

• I had to subclass UITextView to override canBecomeFocused to return true
• I had to set panGestureRecognizer.allowedTouchTypes = [NSNumber(value: UITouchType.indirect.rawValue)]
• I had to set isUserInteractionEnabled = true in code - setting it in Interface Builder didn't seem sufficient
• I had to check "Scrolling Enabled" in Interface builder (setting isScrollEnabled = true in code would also work

A few other niceties I found:

• bounces = true made scrolling feel more natural (had to be set in code; IB setting not respected)
• showsVerticalScrollIndicator = true had to be set in code; IB setting not respected
• Overriding didUpdateFocus(in:with:) to change the background color to visually indicate the focus.

回答4:

For Swift 5, this is what worked for me:

    textView.isUserInteractionEnabled = true;
    textView.isScrollEnabled = true;
    textView.showsVerticalScrollIndicator = true;
    textView.bounces = true;
    textView.panGestureRecognizer.allowedTouchTypes = [NSNumber(value: UITouch.TouchType.indirect.rawValue)]

回答5:

If you use objective-C to do this, It would be very sample：

    _textView.panGestureRecognizer.allowedTouchTypes = @[@(UITouchTypeIndirect)];
    _textView.selectable = YES;
    _textView.scrollEnabled = YES;
    _textView.userInteractionEnabled = YES;

Above these are enough, However, If you use swift to do this, It doesn't work.