Question

每次按下检查按钮，键盘都会理解我按下了它！

如果用户甚至没有在文本字段中输入任何内容，则向用户提供错误答案是没有意义的

那么，如果用户按下第一件事，我怎么能阻止我的检查按钮才能识别它？？

- (IBAction)btncheck:(id)sender {

NSString *answer = [_textbox.text stringByReplacingOccurrencesOfString:@" " withString:@""];

if ([answer isEqualToString:@"q"]) {
    // String is correct, resign keyboard
    _keyboard.hidden = YES;
    _textXclear.hidden = YES;
    //Perfect button
    [_closeone setHidden:NO];
    [_wrongone setHidden:YES];

}
else {
    // Was not correct.  Notify user, or just don't do anything
    [_wrongone setHidden:NO];

    // animation that shakes the image (qimage)


    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.03];
    [UIView setAnimationDelay:0.15];
    [UIView setAnimationRepeatCount:0];
    [UIView setAnimationRepeatAutoreverses:YES]

    qimage.transform = CGAffineTransformMake(1.08, 0, 0, 1, 0, 1.);
    qimage.transform = CGAffineTransformMakeTranslation(0,0);

}

最后，其他名副其实的是需要修复的动画，那么当用户得到错误答案时，将UIImage设置为动画/振动/地震效果或从左向右摇动的正确方法是什么？

Answer 1

为什么不先检查空字符串？

 if([answer isEqualToString:@""]) {
    //do nothing
} else {
    //do your stuff
    if ([answer isEqualToString:@"q"]) {
        // String is correct, resign keyboard
        _keyboard.hidden = YES;
        _textXclear.hidden = YES;
        //Perfect button
        [_closeone setHidden:NO];
        [_wrongone setHidden:YES];

    }
    else {
        // Was not correct.  Notify user, or just don't do anything
        [_wrongone setHidden:NO];

        // animation that shakes the image (qimage)


        [UIView beginAnimations:nil context:nil];
        [UIView setAnimationDuration:0.03];
        [UIView setAnimationDelay:0.15];
        [UIView setAnimationRepeatCount:0];
        [UIView setAnimationRepeatAutoreverses:YES]

        qimage.transform = CGAffineTransformMake(1.08, 0, 0, 1, 0, 1.);
        qimage.transform = CGAffineTransformMakeTranslation(0,0);

    }
}

如何修复自定义键盘才能正常工作？

1 个答案: