在UITextView中滚动文本

-(BOOL)textViewShouldBeginEditing:(UITextView *)textView {
    ...
    NSRange range = NSMakeRange(0,1);
    [note scrollRangeToVisible:range];
    return YES; 
}

CGFloat keyboardHeight = ... // The userInfo variable contains keyboard info.
[textView setContentInsets:UIEdgeInsetsMake(0.0, 0.0, keyboardHeight, 0.0)];