iOS Learning-Start the app screen black screen

Before you learn from the book, there will be a sample program.

Some of these sample programs require the creation of an empty application, but because the version of Xcode used in the book is lower, and I use the latest Xcode, I can't find the empty application option at all.

I think, since there is no empty application, then I create a single View application, and then delete some of the things inside, and then follow the book to do it.

The Main.storyboard file was also deleted.

Then create a new Main.storyboard, then drag a view Controller and add some controls to the view.

Then associate the newly created Uiviewcontroller class and think everything is going well.

And then start running the program, the result, the app start screen at the end, followed by a black screen.

。。。。。。

Then toss for a long time, found that the original is not in the property inspector inside the "is Initial View Controller" option on the hook .

Put this option on the hook and it will work again.

iOS Learning-Start the app screen black screen