界面生成器中的UIScrollView不滚动

Question

所以我试图把一个图像放在我的用户界面中，我试过设置内容大小。

- (void)viewDidLoad{ 
    //[super viewDidLoad]; 
    _trendingImageView.image = [UIImage imageNamed:@"trending.png"]; 
    [self.scrollView setContentSize:CGSizeMake(2000, 2000)]; 
} 
-(void)viewWillAppear:(BOOL)animated{ 
    [super viewWillAppear: animated]; 
    NSLog(@"VIEW WILL APPEAR BEING CALLED"); 
    self.rateView.notSelectedStar =[UIImage imageNamed:@"star-off.png"]; 
    self.rateView.fullSelectedStar = [UIImage imageNamed:@"star-on.png"]; 
    self.rateView.rating = self.rating; 
    self.rateView.editable = YES; 
    self.rateView.maxRating = 5; 
    self.rateView.delegate = self; 
    _pageTitleLabel.text = _pageTitle; 
    //_pageScoreLabel.text = _pageScore; 
    _trendingImageView.image = [UIImage imageNamed:@"trending.png"]; 
    _restaurantImageView.image = _restaurantImage; 
    _descriptionView.text = _description; 
    [self.scrollView setContentSize:CGSizeMake(2000,2000)]; 
} 

scrollView var连接到界面生成器中的滚动视图。这个滚动视图在另一个视图内，它有子视图。

为什么这不滚动？

这是scrollView-

SCROLL VIEW : <UIScrollView: 0xac73010; frame = (0 -108; 320 676); clipsToBounds = YES; autoresize = W+H; gestureRecognizers = <NSArray: 0xac73bd0>; layer = <CALayer: 0xac731e0>; contentOffset: {0, 0}> 

Answer 1

在viewDidLoad方法添加此行：

self.scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 2000, 2000)]; 
    [self.scrollView setScrollEnabled:YES]; 
    [self.scrollView setClipsToBounds:YES]; 
    self.scrollView.delegate = self; 

另外，还要确保你在.h文件中符合<UIScrollViewDelegate>。最后，不需要将内容设置为viewDidLoad和viewWillAppear。只有在viewDidLoad。