键盘出现时如何使 UITextView 可滚动？

Question

我想知道如何在编辑UITextView 时使其可滚动？当用户想要编辑它时，键盘会显示，但UITextView 不再可滚动。所以键盘后面的所有文字都是不可见的。

Answer 1

你可以缩小你在键盘上出现的 textView 的大小

-(void)textViewDidBeginEditing:(UITextView *)textView
{
    CGRect frame = txtAddNote.frame;
    frame.size.height = 150; //Decrease your textView height at this time
    txtAddNote.frame = frame;
}
-(IBAction)DoneBarBtnPress:(id)sender
{
    CGRect frame = txtAddNote.frame;
    frame.size.height = 212; //Original Size of textView
    txtAddNote.frame = frame;

    //Keyboard dismiss 
    [self.view endEditing:YES];
}

Answer 2

当UITextView 开始像这样编辑时滚动视图..

-(void)textViewDidBeginEditing:(UITextView *)textView
{
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.3];
    self.view.frame = CGRectMake(self.view.frame.origin.x, -160, self.view.frame.size.width, self.view.frame.size.height);
    [UIView commitAnimations];

}

在 endEditing 中只需设置默认屏幕，如下所示..

-(void)textViewDidEndEditing:(UITextView *)textView
{
    [textView resignFirstResponder];
    [UIView beginAnimations:nil context:NULL];
    [UIView setAnimationDuration:0.3];
    self.view.frame = CGRectMake(self.view.frame.origin.x, 0, self.view.frame.size.width, self.view.frame.size.height);
    [UIView commitAnimations];
}

更新

根据您的要求，我们使用我们的视图设置框架，请参见下面的代码

-(void)textViewDidBeginEditing:(UITextView *)textView
    {
        [UIView beginAnimations:nil context:nil];
        [UIView setAnimationDuration:0.3];
         [yourTextView setFrame:CGRectMake(self.view.frame.origin.x,self.view.frame.origin.y,self.view.‌​frame.size.width,self.view.frame.size.height - 160)];
        [UIView commitAnimations];

    }

-(void)textViewDidEndEditing:(UITextView *)textView
    {
        [textView resignFirstResponder];
        [UIView beginAnimations:nil context:NULL];
        [UIView setAnimationDuration:0.3];
        [yourTextView setFrame:self.view];
        [UIView commitAnimations];
    }