xcode 5水平滚动不起作用

Question

谁能帮我处理这段代码？只是它不起作用，就像我尝试过的所有垂直滚动一样。我开始认为我的 Xcode 模拟器有问题。代码如下：

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
[super viewDidLoad];
UIScrollView *scroll = [[UIScrollView alloc] initWithFrame:CGRectMake(10, 30, 300, 400)];
[self.view addSubview:scroll];
[scroll setBackgroundColor:[UIColor redColor]];
{

    UIImageView *imageview = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 1222, 400)];
    [imageview setImage:[UIImage imageNamed:@"panorama_orizzonte_medio_big.jpg"]];
    [scroll addSubview:imageview];
    [self.view addSubview:scroll];
}
// Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

@end

Answer 1

设置UIImageView 后，需要将scrollView 的contentSize 设置为imageView 的imageView，所以，如下所示：

[scroll setContentSize:imageview.frame.size];