UIAlert查看目標C - 打開應用商店鏈接

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]; 

我試圖顯示一個「確定」按鈕和一個「購買完整版」按鈕的UIAlertView。我怎樣才能使上面的代碼工作？

感謝

Answer 1

您需要處理在您指定的UIAlertViewDelegate按一下按鈕。

此外，otherButtonTitles簡直是NSString的va_list一個對象作爲標題使用，可以設置當他們在被竊聽，會發生什麼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"]]; 
    } 
} 

不要忘記設置delegate：

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