UIAlert查看目标C - 打开应用商店链接

Question

    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:@"An Alert!" 
                                                   delegate:self cancelButtonTitle:@"OK" otherButtonTitles:[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=301349397&mt=8"]];];
    [alert show];
    [alert release];

我正在尝试使用一个"Ok"按钮和一个"Buy Full Version"按钮显示UIAlertView.如何使上述代码有效？

谢谢

Answer 1

您需要处理UIAlertViewDelegate指定的按钮单击.

此外,otherButtonTitles仅仅是一个va_list的NSString对象作为标题使用,可以设置当他们在被窃听发生的事情UIAlertViewDelegate的alertView:clickedButtonAtIndex:方法:

- (void) alertView:(UIAlertView *) alertView clickedButtonAtIndex:(NSInteger) index {
    if(index == 1) {
       [[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewSoftware?id=301349397&mt=8"]];
    }
}

别忘了设置delegate:

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:nil message:@"An Alert!" 
                                                            delegate:self
                                                   cancelButtonTitle:@"OK"
                                                   otherButtonTitles:@"Buy Full Version"];
[alert show];
[alert release];