iphone - 在运行时在 UIAlertview ios 中添加确定按钮

Question

我在调用 Web 服务时使用进度指示器 View 调用警报。我正在设置这样的警报 View :

    [self.activityIndicatorView setHidden:NO];
self.alertView = [[UIAlertView alloc] initWithTitle:@"Sending Login Request.."
                                       message:@"\n"
                                      delegate:self
                             cancelButtonTitle:nil
                             otherButtonTitles:nil];

self.activityIndicatorView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
self.activityIndicatorView.center = CGPointMake(139.5, 75.5); // .5 so it doesn't blur
[self.alertView addSubview:self.activityIndicatorView];
[self.activityIndicatorView startAnimating];
[self.alertView show];

稍后，如果登录失败，我想在警报 View 上放置“确定”按钮，而不关闭 self.alertView，并再次显示 self.alertView 的新实例。像这样的事情:

if (isThereErrorFromJsonResp) {
    [self.activityIndicatorView stopAnimating];
    [self.activityIndicatorView removeFromSuperview];
    self.activityIndicatorView = nil;
    [self.alertView setTitle:isThereErrorFromJsonResp];
    //here i want to show ok button how?
    return;
}

那么我应该如何放置 OK 按钮呢？有什么建议吗？

Answer 1

删除获取响应时的警报并像这样显示一个新的警报实例

[self.alertView dismissWithClickedButtonIndex:0 animated:YES];
self.alertView = [[UIAlertView alloc] initWithTitle:isThereErrorFromJsonResp
                                       message:@"\n"
                                      delegate:self
                             cancelButtonTitle:@"OK"
                             otherButtonTitles:nil];
[self.alertview show];

解决方案

好的，试过了，明白了

使用

    [alertView dismissWithClickedButtonIndex:0 animated:YES];
    [alertView addButtonWithTitle:@"Ok"];
    [alertView show];

这会将按钮添加到警报 View