1。

让类继承UITextViewDelegate

UITextView *inputTextView;

UIScrollView * _scrollView;

2。在init函数中先创建scrollView

_scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, 416)];

[self.view addSubview:_scrollView];

inputTextView = [[UITextView alloc] initWithFrame:CGRectMake(15, nStartY, 290, 110)];

[inputTextView setFont:[UIFont systemFontOfSize:15]];

inputTextView.backgroundColor = [UIColor clearColor];

inputTextView.delegate = self;

inputTextView.returnKeyType = UIReturnKeyDone;

[_scrollView addSubview:inputTextView];

3。

#pragma mark -

#pragma mark textViewdelegate

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text {

//当点击键盘DONE的时候，关闭键盘

if ([text isEqualToString:@"\n"]) {

        [textView resignFirstResponder];

       return NO;

    }

return YES;

}

- (void)textViewDidBeginEditing:(UITextView *)textView

{

[UIView beginAnimations: nil context: nil];

_scrollView.frame = CGRectMake(0, -80, 320, 416);

[UIView commitAnimations];

}

- (void)textViewDidEndEditing:(UITextView *)textView

{

[UIView beginAnimations: nil context: nil];

_scrollView.frame = CGRectMake(0, 0, 320, 416);

[UIView commitAnimations];

}