如何显示带有活动指示器的警报视图？答案

【问题标题】：How can I show alertview with activity indicator?如何显示带有活动指示器的警报视图？
【发布时间】：2011-06-21 20:38:30
【问题描述】：

我想显示带有消息的警报视图：“正在加载数据”和旋转活动指示器。我该怎么做？

【问题讨论】：

标签： ios iphone uialertview uiactivityindicatorview

【解决方案1】：

注意：此解决方案不适用于 iOS 7 及更高版本。

这是我的看法：

alertView = [[UIAlertView alloc] initWithTitle:@"Submitting Entry"
                                       message:@"\n"
                                      delegate:self
                             cancelButtonTitle:nil
                             otherButtonTitles:nil];

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

并在代码中使用：

[alertView dismissWithClickedButtonIndex:0 animated:YES];

【讨论】：

使用`spinner.center = CGPointMake(0.0, -spinner.frame.size.height); spinner.autoresizingMask = UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin;` 始终将微调器定位在警报的底部中心
微调器不显示。我的 alterView 只显示提交条目。我正在使用 iOS 7。
@coolcool1994 这还没有在 iOS 7 上测试过。2 年前的回答 ;)
确实如此 :) 我希望我能知道 iOS7 的这种方式 :}

【解决方案2】：

这适用于 iOS 7

addSubView 不适用于 iOS 7 及更高版本的 UIAlertView。试试这个

UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Loading data" message:nil delegate:nil cancelButtonTitle:nil otherButtonTitles: nil];

UIActivityIndicatorView *indicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
[indicator startAnimating];

[alertView setValue:indicator forKey:@"accessoryView"];
[alertView show];

然后关闭它

[alertView dismissWithClickedButtonIndex:0 animated:YES];

【讨论】：

这是适用于 iOS 7 的解决方案（针对此评论的当前日期）。

【解决方案3】：

您可以添加标签和活动指示器作为警报视图的子视图。你必须做这样的事情

myAlertView = [[UIAlertView alloc] initWithTitle:@"Loading" message:@"\n\n"
                                        delegate:self
                               cancelButtonTitle:@""
                               otherButtonTitles:@"OK", nil];  

UIActivityIndicatorView *loading = [[UIActivityIndicatorView alloc]
                initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];   
loading.frame=CGRectMake(150, 150, 16, 16);
[myAlertView addSubview:loading];
[myAlertView show];

..在这种情况下最好使用 UIActionSheet...

【讨论】：

谢谢，我会用 UIActionSheet + UIActivityIndicatorView
为什么要在这种情况下使用 UIActionSheet？（我知道 Apple 可能会同意你的看法，但我想知道为什么）。你没有使用任何私有 API，对吧？
你错过了[loading startAnimating]，而且还有空按钮显示。
你会错过 [loading startAnimating];我猜

【解决方案4】：

您可以添加标签和活动指示器作为警报视图的子视图。你必须做这样的事情......

- (IBAction)showAlertWithActivity:(id)sender{

alerta = [[UIAlertView alloc] initWithTitle:@"Guardando datos..."
                                            message:@"\n"
                                           delegate:self
                                  cancelButtonTitle:nil
                                  otherButtonTitles:nil];

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


        [self performSelector:@selector(close) withObject:self afterDelay:1];


    }
    -(void)close{

        [alerta dismissWithClickedButtonIndex:0 animated:YES];

    }

【讨论】：

【解决方案5】：

在你的 .h 文件中添加这个 UIAlertView *connectingAlert;

并将这两个函数添加到您的 .m 文件中

//show loading activity.
- (void)startSpinner:(NSString *)message {
    //  Purchasing Spinner.
    if (!connectingAlert) {
        connectingAlert = [[UIAlertView alloc] initWithTitle:NSLocalizedString(message,@"")
                                                 message:nil
                                                delegate:self
                                       cancelButtonTitle:nil
                                       otherButtonTitles:nil];
        connectingAlert.tag = (NSUInteger)300;
        [connectingAlert show];

        UIActivityIndicatorView *connectingIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
        connectingIndicator.frame = CGRectMake(139.0f-18.0f,50.0f,37.0f,37.0f);
        [connectingAlert addSubview:connectingIndicator];
        [connectingIndicator startAnimating];

    }
}
//hide loading activity.
- (void)stopSpinner {
    if (connectingAlert) {
        [connectingAlert dismissWithClickedButtonIndex:0 animated:YES];
        connectingAlert = nil;
    }
    // [self performSelector:@selector(showBadNews:) withObject:error afterDelay:0.1];
}

然后调用

[self startSpinner:@"Your message........"];
[self stopSpinner];

【讨论】：

【解决方案6】：

在 Swift 3 中

let loadingAlertController = UIAlertController(title: "Loading", message: nil, preferredStyle: .alert)

let activityIndicator = UIActivityIndicatorView(activityIndicatorStyle: .gray)
activityIndicator.translatesAutoresizingMaskIntoConstraints = false

loadingAlertController.view.addSubview(activityIndicator)

let xConstraint = NSLayoutConstraint(item: activityIndicator, attribute: .centerX, relatedBy: .equal, toItem: loadingAlertController.view, attribute: .centerX, multiplier: 1, constant: 0)

let yConstraint = NSLayoutConstraint(item: activityIndicator, attribute: .centerY, relatedBy: .equal, toItem: loadingAlertController.view, attribute: .centerY, multiplier: 1.4, constant: 0)

NSLayoutConstraint.activate([ xConstraint, yConstraint])

activityIndicator.isUserInteractionEnabled = false
activityIndicator.startAnimating()

let height: NSLayoutConstraint = NSLayoutConstraint(item: loadingAlertController.view, attribute: NSLayoutAttribute.height, relatedBy: NSLayoutRelation.equal, toItem: nil, attribute: NSLayoutAttribute.notAnAttribute, multiplier: 1, constant: 80)

loadingAlertController.view.addConstraint(height);

self.present(loadingAlertController, animated: true, completion: nil)

【讨论】：

【解决方案7】：

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Alarm" message:@"" delegate:nil cancelButtonTitle:nil otherButtonTitles:nil];

UIActivityIndicatorView *loading = [[UIActivityIndicatorView alloc]
                                    initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];   
loading.frame=CGRectMake(125, 50, 36, 36);
[loading startAnimating];
[alert addSubview:loading];
[alert show];

【讨论】：