ViewController的view的创建
先加载storyboard文件(Test是storyboard的文件名)
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Test" bundle:nil];
•接着初始化storyboard中的控制器
Ø初始化“初始控制器”(箭头所指的控制器)
MJViewController *mj = [storyboard instantiateInitialViewController];
Ø
Ø通过一个标识初始化对应的控制器
MJViewController *mj = [storyboard instantiateViewControllerWithIdentifier:@”mj"];