UITextView 监听点击了returnKey 的方法

- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text{    if ([text isEqualToString:@"\n"]) {                [UIView animateWithDuration:0.25 animations:^{            <span style="white-space:pre"></span>做任何事！

        }];                [textView resignFirstResponder];        return NO;    }        return YES;}