控制器的创建方式
第一种
1 #import "AppDelegate.h" 2 #import "DJOneViewController.h"//新建一个空的视图控制器 3 @interface AppDelegate () 4 5 @end 6 7 @implementation AppDelegate 8 9 10 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 11 self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds]; 12 self.window.backgroundColor = [UIColor redColor]; 13 //1通过代码加载视图 14 UIViewController *onectl = [[UIViewController alloc]init]; 15 onectl.view.backgroundColor = [UIColor blueColor]; 16 self.window.rootViewController = onectl; 17 18 [self.window makeKeyAndVisible]; 19 return YES; 20 }
第二种 加载storyBoard
1 #import "AppDelegate.h" 2 //#import "DJOneViewController.h" 3 #import "DJTwoViewController.h" 4 @interface AppDelegate () 5 6 @end 7 8 @implementation AppDelegate 9 10 11 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 12 self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds]; 13 self.window.backgroundColor = [UIColor redColor]; 14 15 //2-1通过storyboard加载视图 16 UIStoryboard *twoView = [UIStoryboard storyboardWithName:@"two" bundle:nil]; 17 UIViewController *two = [twoView instantiateInitialViewController]; 18 self.window.rootViewController = two; 19 2-2通过id传送窗口 20 DJTwoViewController *two2 = [twoView instantiateViewControllerWithIdentifier:@"blue"];
self.window.rootViewController = two2; 22 [self.window makeKeyAndVisible]; 23 return YES; 24 }
//第二种 加载xib xib文件要设置视图控件 然后指定主控制器 确定class （很早之前创建方式）
1 #import "AppDelegate.h" 2 //#import "DJOneViewController.h" 3 //#import "DJTwoViewController.h" 4 #import "DJThreeViewController.h" 5 @interface AppDelegate () 6 7 @end 8 9 @implementation AppDelegate 10 11 12 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { 13 self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds]; 14 self.window.backgroundColor = [UIColor redColor]; 15 16 DJThreeViewController *three = [[DJThreeViewController alloc]initWithNibName:@"Three" bundle:nil]; 17 self.window.rootViewController = three; 18 19 [self.window makeKeyAndVisible]; 20 return YES; 21 }
