UITextView scrollEnabled = YES not working after set scrollEnabled = NO in iOS8

Question

I create a demo for checking UITextView scrollEnabled. It only contains 1 UITextView and 2 button enable and disable scroll

• I test on simulator and device iOS 8, if I click the disable scroll button, the UITextView will disable scroll correctly, but after that I click on enable scroll, the UITextView won't enable scroll

• However, I test on device iOS9, the enable and disable scroll work well.

  #import "ViewController.h"  @interface ViewController ()      @property (weak, nonatomic) IBOutlet UITextView *myTextView;  @end  @implementation ViewController  - (void)viewDidLoad {     [super viewDidLoad]; }  - (IBAction)enableScrollButtonPressed:(id)sender{     self.myTextView.scrollEnabled = YES; }  - (IBAction)disableScrollButtonPressed:(id)sender{     self.myTextView.scrollEnabled = NO; }  @end 

Any idea to fix this problem? If someone don't understand my explain please check my demo project
Any help or suggestion would be great appreciated

Answer 1

The problem is that in iOS 8, contentSize is not adjusted correctly when scrollEnabled is changed. A small adjustment to your enableScrollButtonPressed method will successfully work around the problem.

-(IBAction)enableScrollButtonPressed:(id)sender {     self.myTextView.scrollEnabled = YES;     self.myTextView.contentSize = [self.myTextView sizeThatFits:self.myTextView.frame.size]; }