ios - 'SpringBoard' 可能不会响应 presentViewController

Question

我目前正在尝试对 iOS 9.3.3 进行一个非常简单的基线调整，以便在 Springboard 启动时显示一条消息。它一直给我这个错误，我不知道如何纠正它。任何帮助将不胜感激。我不使用 UIAlertView 的原因是它已被弃用。

错误:

> Making all for tweak UIAlertControllerTest
==> Preprocessing Tweak.xm
==> Compiling Tweak.xm (armv7)
Tweak.xm:9:8: error: 'SpringBoard' may not respond to
  'dismissViewControllerAnimated:completion:' [-Werror]
    [self dismissViewControllerAnimated:YES completion:nil];
     ~~~~ ^
Tweak.xm:12:8: error: 'SpringBoard' may not respond to
  'presentViewController:animated:completion:' [-Werror]
    [self presentViewController:alertController animated:YES complet...
     ~~~~ ^
2 errors generated.
make[3]: ***     [/home/theodd/Desktop/uialertcontrollertest/.theos/obj/debug/armv7/Tweak.xm.ae1dfb2c.o] Error 1
make[2]: ***     [/home/theodd/Desktop/uialertcontrollertest/.theos/obj/debug/armv7/UIAlertControllerTest.dylib] Error 2
make[1]: *** [internal-library-all_] Error 2
make: *** [UIAlertControllerTest.all.tweak.variables] Error 2

Tweak.xm:

#import <SpringBoard/SpringBoard.h>

%hook SpringBoard

-(void)applicationDidFinishLaunching:(id)application {
%orig;
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"TestTitle" message:@"TestMessage" preferredStyle:UIAlertControllerStyleAlert];
[alertController addAction:[UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
[self dismissViewControllerAnimated:YES completion:nil];
}]];

[self presentViewController:alertController animated:YES completion:nil];
}

%end

Answer 1

SpringBoard 是一个 FBSystemApp，并且是 UIApplication 的子类，而不是 UIViewController。方法 -presentViewController:animated:completion: 是一个 UIViewController 实例方法，因此您想从其中调用它。

我建议您阅读一些关于类如何工作的文章，基本的 Objective-C 内容，不一定是特定于越狱的。