UIAlertView2.m

- (void)onLogout {
    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"離開程式"
                                                    message:@"請確定是否離開程式"
                                                    delegate:self
                                                    cancelButtonTitle:@"取消"
                                                    otherButtonTitles:@"是的", nil];
    alert.tag = 1;
    [alert show];
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
    
    if (alertView.tag == 1) {
        
        if (buttonIndex == 1) {
            
            // 按下“是的”後的行為
        }
        else{
            
        }
    }
    else{
        
        [self doParse];
    }
}