ios - 通过按下 UILabel 打开/关闭 UISwitch

Question

我有这个方法，它在它们旁边显示 UILabel 和 UISwitch。我也希望通过按下标签来打开和关闭 UISwitch。我已经标记了开关，但我不知道下一步该做什么。任何帮助将不胜感激。谢谢!

while (i < numberOfAnswers) {
    UILabel *answerLabel = [[UILabel alloc] initWithFrame:CGRectMake(65, y+spaceBetweenAnswers, 240, 30)];
    answerLabel.text = [NSString stringWithFormat:@"%@ (%@)", questionBank[randomQuestionNumber][1][i][0],questionBank[randomQuestionNumber][1][i][1]];
    answerLabel.font = [UIFont systemFontOfSize:15];
    answerLabel.textColor = [UIColor darkGrayColor];
    answerLabel.numberOfLines=0;
    [answerLabel sizeToFit];
    [_answerView addSubview:answerLabel];
    answerHeight = answerLabel.frame.size.height + spaceBetweenAnswers;

    UISwitch *mySwitch = [[UISwitch alloc] initWithFrame:CGRectMake(10, y+spaceBetweenAnswers-5, 0, 30)];
    mySwitch.transform = CGAffineTransformMakeScale(0.75, 0.75);
    if ([questionBank[randomQuestionNumber][1][i][1] isEqual:@"0"]) {
         [mySwitch addTarget:self action:@selector(wrongAnswer:) forControlEvents:UIControlEventValueChanged];
    } else {
    }
    mySwitch.tag = i;
    [_answerView addSubview:mySwitch];
}

Answer 1

使用 UIButton 而不是 UILabel 并在其上设置 IBAction。您可以将按钮样式设置为看起来与标签完全一样。您的 IBAction 方法应如下所示:

- (void)buttonPressed:(UIButton *)sender
{
    //Get the view by tag
    UISwitch *mySwitch = (UISwitch *)[self.view viewWithTag:yourTag];
    [mySwitch.setOn:![mySwitch isOn]];
}

编辑

如前所述，由于您是在代码中构建 UIButton，因此您需要将目标添加到按钮以获取按钮点击。像这样添加操作:

[button addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];