UIViewController的－init方法和- (inst

HomePageViewController *homePageViewController = [[HomePageViewController alloc] init];

视图控制器对象的-init方法的内部会自动调用-initWithNibName: bundle:方法

• (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {

  self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];

  if (self) {

    [self requestContentForHomePageAtIndex:0];
  

  }

  return self;
  }