UIScrollView IOS中的Xcode UIImageView

Question

你能帮帮我吗？我想通过滚动添加背景图片，因为我的背景图片太高了。我怎样才能做到这一点？我添加 UIScrollView 并添加 UIImageView 但它不滚动。

感谢您的回复。

Answer 1

这是工作代码：

- (void)viewDidLoad
{
    [super viewDidLoad];

    //create scrollView and set the frame to the size you want.
    //In this example the scrollView frame is the whole ViewController size
    UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
    [scrollView setBackgroundColor:[UIColor clearColor]];

    //create a UIImage,set the imageName to your image name
    UIImage *image = [UIImage imageNamed:@"YourImageName.png"];
    //create UIImageView and set imageView size to you image height
    UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, image.size.height)];
    [imageView setImage:image];

    //add ImageView to your scrollView
    [scrollView addSubview:imageView];

    //set content size of you scrollView to the imageView height
    [scrollView setContentSize:CGSizeMake(self.view.frame.size.width, imageView.frame.size.height)];


    [self.view addSubview:scrollView];
}

Answer 2

如果您希望滚动视图滚动，请将内容大小设置为大于滚动视图框架。