创建空模板

由于Xcode升级后,去掉了空模板.所以.......

实现步骤如下:
1.删除掉info.plist - main
2.删除Viewcontroller及其对应的Story'bord.
3.
    self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
    self.window.backgroundColor = [UIColor whiteColor];
    TXBasicViewController *basicVC = [[TXBasicViewController alloc] init];
    self.window.rootViewController = basicVC;
    [self.window makeKeyAndVisible];
    

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