全局使用MBProgressHUD +使其成为单身人士 [英] Use of MBProgressHUD Globally + make it singleton

问题描述

在我的项目中，每个用户交互事件都进行网络调用（即TCP，而不是HTTP）。我需要活动指标从显示全局到 UIViewController 并隐藏从 NetworkActivityManager Class（处理网络活动的自定义类，它不是UIViewController或UIView的子类）。

In my Project, each of the user interaction events make a network call (Which is TCP, not HTTP). I need Activity Indicator to be global to show from a random UIViewController and hide from NetworkActivityManager Class (a custom class to handle network activities, Which is not a subclass of UIViewController or UIView).

搜索网络后我发现了 MBProgressHUD 用于同一目的，但我无法找到一个关于如何全局使用它的示例。 （通过说全局我的意思是 MBProgressHUD 的单个对象以及显示和隐藏它的类方法。）

After searching the web I found out that MBProgressHUD is used for the same purpose, but I wasn't able to find out an example on how would I use it globally. (By saying global I mean a singleton object of MBProgressHUD and class methods to SHOW and HIDE it.)

以下是我尝试过的，但是，失败：
在 AppDelegate.h中：

Following is what I have tried yet, but, failed: In AppDelegate.h:

@property（非原子，保留）MBProgressHUD * hud;

在 AppDelegate.m中：

@synthesize hud;

在一些随机的UIViewController对象中：

In some random UIViewController object:

appDelegate.hud = [MBProgressHUD showHUDAddedTo:appDelegate.navigationController.topViewController.view animated:YES];
appDelegate.hud.labelText = @"This will take some time.";

隐藏它时，从 NetworkActivityManager 类：

[MBProgressHUD hideHUDForView:appDelegate.navigationController.topViewController.view animated:YES];

这会使项目在一段时间后崩溃（由于内存问题。）
I我在我的项目中使用ARC，而且，我正在使用ARC版本的 MBProgressHUD 。

This makes the project to crash after some time (due to memory issues.) I am using ARC in my project and also, I am using the ARC version of MBProgressHUD.

我错过了什么？

重要问题：

我可以让 MBProgressHUD 像UIAlertView一样工作吗？ （说我的意思是 MBProgressHUD 的实现独立于UIView - 它使用 showHUDAddedTo：来呈现）???

Can I make MBProgressHUD work like UIAlertView? (Saying that I mean implementation of MBProgressHUD independent of UIView -- sa it uses showHUDAddedTo: to present itself) ???

请注意：在上面隐藏MBProgressHUD的代码中，View可能会与显示MBProgressHUD时的内容有所不同。

Please Note: In the above code of hiding MBProgressHUD, View may be changed from what it was when showing MBProgressHUD.

任何帮助非常感谢。

推荐答案

您可以将此添加到您喜欢的课程中：

You could add this to a class of your liking:

+ (MBProgressHUD *)showGlobalProgressHUDWithTitle:(NSString *)title {
    UIWindow *window = [[[UIApplication sharedApplication] windows] lastObject];
    MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:window animated:YES];
    hud.labelText = title;
    return hud;
}

+ (void)dismissGlobalHUD {
    UIWindow *window = [[[UIApplication sharedApplication] windows] lastObject];
    [MBProgressHUD hideHUDForView:window animated:YES];
}

这可以在任何类上调用。使用这些类便捷方法时，您无需对HUD进行强有力的引用。

This can be than called on any class. You don't need to keep a strong reference to the HUD when using those class convenience methods.

根据您的具体情况，您可能还希望处理在隐藏另一个hud之前请求新hud的情况。当新的进入或者出现某种排队等时，你可以食用隐藏之前的hud。

Depending on your specific situation you'll probably also want to handle cases where a new hud is requested before the other one is hidden. You could eater hide the previous hud when a new comes in or come up with some sort of queueing, etc.

在显示新的HUD实例之前隐藏它是很漂亮的直截了当。

Hiding the previous HUD instance before showing a new one is pretty straightforward.

+ (MBProgressHUD *)showGlobalProgressHUDWithTitle:(NSString *)title {
    UIWindow *window = [[[UIApplication sharedApplication] windows] lastObject];
    [MBProgressHUD hideAllHUDsForView:window animated:YES];
    MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:window animated:YES];
    hud.labelText = title;
    return hud;
}

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