class="Apple-tab-span"> 1、选择模版Single View Application
2、将Main.storyboard 和LaunchScreen.xib删除
3、在Info.plist中,把Launch screen interface file base name 以及Main storyboard file base name删除
4、点击在target里的Use Asset Catalog,对话框里直接点击Migrate
5、在AppDelegate的第一个方法里面添加代码:
OC:
(1)、创建window
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
(2)、设置window背景
self.window.backgroundColor = [UIColor whiteColor];
(3)、使window可见
[self.window makeKeyAndVisible];
Swift
self.window = UIWindow(frame:UIScreen.mainScreen().bounds);
self.window!.backgroundColor = UIColor.whiteColor();
self.window!.makeKeyAndVisible();