当我设置按钮标题时，会有淡出和淡出效果

Question

当我使用setTitle: forState:方法设置我的按钮标题时，会有淡出效果和淡入效果。

- (void)respondsToTextField:(UITextField *)sender {

    if ([sender.text isEqualToString:@""]) {


        [_cancleOrConfirmButton setTitle:@"Cancel" forState:UIControlStateNormal];

    }else {

        [_cancleOrConfirmButton setTitle:@"Search" forState:UIControlStateNormal];

    }

}

如何解决？

Answer 1

尝试使用它。

- (void)respondsToTextField:(UITextField *)sender {

    if ([sender.text isEqualToString:@""]) {

       [UIView performWithoutAnimation:^{
           [_cancleOrConfirmButton setTitle:@"Cancel" forState:UIControlStateNormal];
          [_cancleOrConfirmButton layoutIfNeeded];
    }]; 

    }else {

    [UIView performWithoutAnimation:^{
       [_cancleOrConfirmButton setTitle:@"Search" forState:UIControlStateNormal];
       [_cancleOrConfirmButton layoutIfNeeded];
    }]; 

    }
}

Answer 2

当您设置按钮标题时，如果不想要效果，您可以先设置titleLable.text。

试试这个：

- (void)respondsToTextField:(UITextField *)sender {

    if ([sender.text isEqualToString:@""]) {

        _cancleOrConfirmButton.titleLabel.text = @"Cancel";
        [_cancleOrConfirmButton setTitle:@"Cancel" forState:UIControlStateNormal];

    }else {

        _cancleOrConfirmButton.titleLabel.text = @"Search";
        [_cancleOrConfirmButton setTitle:@"Search" forState:UIControlStateNormal];

    }

}

Answer 3

试试这个它在我的代码中工作：

if r[3]=='Device':