以编程方式创建时 UITextView 不滚动

Question

I am creating UITextView programmatically.

content = UITextView(frame: CGRect(x: 0, y: header.frame.origin.y + header.frame.size.height, width: self.frame.size.width, height: self.frame.size.height - viewTop.frame.size.height))
content.font = UIFont.init(name: "OpenSans", size: 17)
content.textColor = UIColor.black
content.backgroundColor = UIColor.white
content.isUserInteractionEnabled = true
content.isScrollEnabled = true
content.isEditable = true
content.isSelectable = true
content.bounces = true
content.showsVerticalScrollIndicator = true  
self.addSubview(content)  

It is not scrolling though.

Answer 1

TextView will scroll only when the Content Size is greater then the textView's frame. So on setting the textView's text with enough text should allow it to scroll.

Answer 2

Seems like that the code for adding the textview is probably in the viewDidLoad method. When you add any view in viewDidLoad method there are good chance that the view will not have proper frame and content size. Also there are good chance that any other view can ovelap on that. You can check by debuging the view by clicking the image in debug area.

If the above scenario is right then you can fix the problem by putting content.bringSubview(toFront: self.view) in viewDidApear method.

Answer 3

You have added the content view to it self. Change this to view and it will scroll.

view.addSubview(content)