ios - 'SpringBoard'可能不响应presentViewController

我目前正在尝试对iOS 9.3.3进行非常简单的基准调整，以仅在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的原因是因为它已弃用。

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

最佳答案

SpringBoard是FBSystemApp，并且通过扩展，是UIApplication子类，而不是UIViewController。方法-presentViewController:animated:completion:是UIViewController实例方法，因此您要从一个实例中调用它。

我建议您阅读有关类如何工作的一些基本的Objective-C知识，而不必专门针对越狱。

关于ios - 'SpringBoard'可能不响应presentViewController，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/39645673/