为什么我的故事板无法在模拟器上启动？

Question

I built a storyboard like this:

I didn't write a single line of code, and my settings seem to be correct.

So why do I always get a blank screen on simulator?

Please help me.

Answer 1

Is your app delegate explicitly creating *window ? If so, delete that line of code.

// self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

But keep the property definition:

@property (strong, nonatomic) UIWindow *window; // keep this

Answer 2

@oratis have you checked in AppDelegate @synthesize window = _window; it might be the reason for unrecognized selector