重载FMX.Platform.iOS中的方法

问题描述

在FMX.Platform.iOS内，此方法已添加到App委托

within FMX.Platform.iOS this method is added to the App delegate

class_addMethod(appDelegateClass, sel_getUid('application:didReceiveLocalNotification:'),
@applicationDidReceiveLocalNotification, 'v@:@@');

其过程为:

procedure applicationDidReceiveLocalNotification(self: id; _cmd: SEL; application: PUIApplication;
notification: Pointer); cdecl;

begin
  PlatformCocoa.FAppDelegate.application(TUIApplication.Wrap(application), TUILocalNotification.Wrap(notification));
end;

我想在我的主机中重载此方法，但是仅当我从FMX.Platform.iOS

I want to overload this method in my main unit, but it only works if I remove the declaration of it from FMX.Platform.iOS

在我的主单元中，按如下所示添加方法:

In my main unit I add the Method as follows:

class_addMethod(objc_getClass('DelphiAppDelegate'), sel_getUid('application:didReceiveLocalNotification:'),
@applicationDidReceiveLocalNotification, 'v@:@@');

我的程序

procedure applicationDidReceiveLocalNotification(self: id; _cmd: SEL;
application: PUIApplication; notification: Pointer);
begin
    ShowMessage('it works');
end;

我想尽我所能，尽量不使用FMX.Platform.iOS源代码，有没有办法告诉编译器使用我的applicationDidReceiveLocalNotification而不是源代码中的那个?

I want to try and Keep out of the FMX.Platform.iOS source as much as I can, is there a way to tell the compiler to use my applicationDidReceiveLocalNotification and not the one in the source?

推荐答案

由于Embarcadero的方法是使用Objective-C的class_addMethod()添加的，因此请尝试使用Objective-C的class_replaceMethod()函数将其替换为您自己的实现.大量的在线教程介绍了如何在iOS中使用方法混淆来添加/覆盖方法.请四处搜寻.不过，您将找不到任何Delphi示例，因此您将不得不进行一些翻译.

Since Embarcadero's method is added using Objective-C's class_addMethod(), try using Objective-C's class_replaceMethod() function to replace it with your own implementation. There are tons of online tutorials that explain how to use method swizzling in iOS to add/override methods. Please search around. You will not find any Delphi examples, though, so you will have to do some translating.

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