ios - 检查第二个 UIAlertView 的 buttonIndex

Question

我在一个方法中有 2 个 alertView，我想检查第二个 alertView 的按钮索引。我该怎么做？我想获取 else 条件的 buttonIndex。下面是我正在尝试执行的代码。

-(IBAction)buttonClick{

    NSString *connect = [NSString stringWithContentsOfURL:[NSURL URLWithString:@"http://www.xyz.com"] encoding:NO error:nil];

    if(connect == NULL) {        
        UIAlertView *alert=[[UIAlertView alloc]initWithTitle:@"No Internet Connection" message:@"Please check your internet connection" delegate:self cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];        
        [alert show];               
    } else {    
        UIAlertView *alert1=[[UIAlertView alloc]initWithTitle:@"Upload to the server?" message:@"" delegate:self cancelButtonTitle:@"OK" otherButtonTitles:@"CANCEL",nil];    
        [alert1 show];        
    }
}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
    if (buttonIndex == 0) {
        My functionality
}   

Answer 1

一种方法是让警报 View 的实例全局化并在警报 View 的委托(delegate)方法中检查它们:

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    //  assuming the myAlert2 is your alert's instance
    if (alertView == myAlert2)
    {
        if (buttonIndex == 0)
        {
            ...
        }
    }
 }

或者您可以只给警报添加标签，然后在 alertView 的委托(delegate)方法中检查标签，例如:

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
    if (alertView.tag == 2)
    {
        if (buttonIndex == 0)
        { 
            ...
        }
    }
}