Question

我想让UIViewController视图类成为一个scrollView。我该怎么做？

Answer 1

只需在UIScrollView方法中将视图初始化为-loadView（您需要覆盖它）。

- (void)loadView {
  self.view = [[UIScrollView alloc] initWithFrame:...];
  // do other init stuff;
}

您无需致电[super loadView]，它只会分配默认UIView个实例，并将其分配给view。

Answer 2

为什么不：

@implementation MyScrollViewController
...
...
-(void)viewDidLoad
{
    [super viewDidLoad];
    //configure my scrollview (self.view).  This may require you to cast your self.view to UIScrollView.
}
-(void)loadView
{
   UIScrollView *sv = [UIScrollView alloc] init] autorelease]; //will be retained by self.view
   self.view = sv ;
}
...
...
@end

修改超类的属性

2 个答案: