Xcode xib 窗口

Xcode窗口：

在没有xib窗口情况下，可以自己创建一个窗口

.h

@property (strong, nonatomic) UIWindow *window;

.m

@synthesize window = _window;

self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

    // Override point for customization after application launch.

    self.window.backgroundColor = [UIColor whiteColor];

    [self.window makeKeyAndVisible];

或是已经有了:

@property (strong, nonatomic) UIWindow *window;

@property (strong, nonatomic) ConnectViewController *viewController;

.m

@synthesize window = _window;

@synthesize viewController = _viewController;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions

{

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

    // Override point for customization after application launch.

    self.viewController = [[ConnectViewController alloc] initWithNibName:@"ConnectViewController" bundle:nil];

    self.window.rootViewController = self.viewController;

    [self.window makeKeyAndVisible];

    return YES;

}