将启动屏幕图像与xcode故事板一起使用

Question

I am trying to create a custom launch screen for ios devices. I have created a story board called Green Screen and selected this as the launch screen file. I have added some images to the LaunchImage cassete in Images.xcassetes , though I have not filled every slot. I have added an Image View box to the Green Screen view, but when when I select that image box and select the image dropdown, I do not see LaunchImage as a selection.

However, if I create my own cassete, called prototype launch image , then when I go to to the image view, I can select ```prototype launch image``, add it to the image box, and stretch the image to fill the screen. However when the launch screen appears on building the app, the image is not centred and there is white space at bottom, so this does not seem to be a viable approach.

How do I add the LaunchImage cassette to this storyboard?

I am using Xcode 7.2.

Answer 1

如Paulw11注释中指出的（请参见上文），您需要选择图像视图，然后适当地设置约束。