如何在UIAlertView中创建自定义UIButton

Question

所以我试图在UIAlertView中嵌入一个可切换的(是一个单词吗？)"不再显示这个"按钮,但是我遇到了一些我似乎无法绕过的麻烦.

这是我迄今为止的非工作代码......

编辑:我添加了按钮的方法,并对原始代码进行了一些更改.现在我按下按钮对印刷机作出反应,但结果是崩溃.有帮助吗？

if (![[NSUserDefaults standardUserDefaults] objectForKey:@"disclaimer"]){


UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"DISCLAIMER" 
                                                message:@"This program is a blah blah"
                                               delegate:self 
                                      cancelButtonTitle:nil
                                      otherButtonTitles:@"I Agree", nil];

UILabel *alertLabel = [[UILabel alloc] initWithFrame:CGRectMake(30, 230, 260, 50)];
alertLabel.backgroundColor = [UIColor clearColor];
alertLabel.textColor = [UIColor whiteColor];
alertLabel.text = @"Do not show again";
[alert addSubview:alertLabel];
[alertLabel release];

//declared alertCheckboxButton in the header due to errors I was getting when referring to the button in the button's method below
alertCheckboxButton = [UIButton buttonWithType:UIButtonTypeCustom];
alertCheckboxButton.frame = CGRectMake(200, 247, 16, 16);
alertCheckboxButton.backgroundColor = [UIColor clearColor];
UIImage *alertButtonImageNormal = [UIImage imageNamed:@"checkbox.png"];
UIImage *alertButtonImagePressed = [UIImage imageNamed:@"checkbox-pressed.png"];
UIImage *alertButtonImageChecked = [UIImage imageNamed:@"checkbox-checked.png"];
[alertCheckboxButton setImage:alertButtonImageNormal forState:UIControlStateNormal];
[alertCheckboxButton setImage:alertButtonImagePressed forState:UIControlStateHighlighted];
[alertCheckboxButton setImage:alertButtonImageChecked forState:UIControlStateSelected];
[alertCheckboxButton addTarget:self action:@selector(alertCheckboxButtonClicked:) forControlEvents:UIControlEventTouchUpInside];

//made the button a subview of alert rather than alertLabel
[alert addSubview:alertCheckboxButton];  
[alert show];

//moved alertCheckboxButton release to (void)dealloc
[alert release];    

}


-(void)alertCheckboxButtonClicked{

if (![[NSUserDefaults standardUserDefaults] objectForKey:@"disclaimer"]){

    [[NSUserDefaults standardUserDefaults] setBool:TRUE forKey:@"disclaimer"];
    alertCheckboxButton.selected = YES;
}else {

    [[NSUserDefaults standardUserDefaults] removeObjectForKey:@"disclaimer"];
    alertCheckboxButton.selected = NO;
    }

}

Answer 1

如果您想将此按钮设置为切换按钮，请为该按钮分配一个标签，然后在其事件函数中检查标签是否为 0，然后将其设置为 1，并在那里设置一个 BOOL。当您将其添加到警报中时，请检查 BOOL 值（如果为真），同时更改按钮图像和标签。