在UIScrollview上显示UIButton Done的图像

Question

想要在图像UIScrollView上显示UIButton完成的。使用以下代码显示UIButton但是当我滚动UIImageView s时，它仅在第一个图像视图上显示，而我想要UIButton应该显示在UIScrollView中的所有图像视图上。

 - (void)viewDidLoad
 {
 self.view.backgroundColor = [UIColor blackColor];
UIScrollView *imageScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
UIButton *myButton = [UIButton buttonWithType:UIButtonTypeCustom];
[myButton addTarget:self action:@selector(dismissView:) forControlEvents:UIControlEventTouchUpInside];
myButton.frame = CGRectMake(0, 0, 60, 35);
[myButton.layer setMasksToBounds:YES];
[myButton.layer setCornerRadius:10.0f];
myButton.layer.borderWidth = 2;
myButton.layer.borderColor = [[UIColor whiteColor] CGColor];
[myButton setTitle:@"Done" forState:UIControlStateNormal];
myButton.backgroundColor = [UIColor blackColor];
UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithCustomView:myButton];
[[self navigationItem] setRightBarButtonItem:button animated:YES];
imageScrollView.pagingEnabled = YES;
NSInteger numberOfViews = 61;
for (int i = 0; i < numberOfViews; i++) {
    CGFloat xOrigin = i * self.view.frame.size.width;
    NSString *imageName = [NSString stringWithFormat:@"image%d.png", i];
    UIImage *image = [UIImage imageNamed:imageName];
    UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
    imageView.frame = CGRectMake(xOrigin, 0, self.view.frame.size.width, self.view.frame.size.height);
    [imageScrollView addSubview:imageView];
    [imageScrollView addSubview:myButton];
    [imageView release];
   }
imageScrollView.contentSize = CGSizeMake(self.view.frame.size.width * numberOfViews, self.view.frame.size.height);
[self.view addSubview:imageScrollView];
[imageScrollView release];
 }

我应该如何编码，当我滚动它时UIButton完成应该显示在所有图像视图上。

Answer 1

将

UIButton添加到 for 循环中，即每次添加新ImageView时都可以添加。并更改每个imageView的x_Origin -

- (void)viewDidLoad
{
    [super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
    UIScrollView *imageScrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
    imageScrollView.pagingEnabled = YES;
    NSInteger numberOfViews = 61;
    for (int i = 0; i < numberOfViews; i++) 
    {
        CGFloat xOrigin = i * self.view.frame.size.width;
        UIButton *myButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [myButton addTarget:self action:@selector(dismissView) forControlEvents:UIControlEventTouchUpInside];
        myButton.frame = CGRectMake(xOrigin, 0, 60, 35);
        [myButton setTitle:@"Done" forState:UIControlStateNormal];
        myButton.backgroundColor = [UIColor blackColor];
        [myButton.layer setMasksToBounds:YES];
       [myButton.layer setCornerRadius:10.0f];
        myButton.layer.borderWidth = 2;
        myButton.layer.borderColor = [[UIColor whiteColor] CGColor];
        NSString *imageName = [NSString stringWithFormat:@"image%d.png", i];
        UIImage *image = [UIImage imageNamed:imageName];
        UIImageView *imageView = [[UIImageView alloc] initWithImage:image];
        imageView.frame = CGRectMake(xOrigin, 0, self.view.frame.size.width, self.view.frame.size.height);
        [imageScrollView addSubview:imageView];
        [imageScrollView addSubview:myButton];
    }
    imageScrollView.contentSize = CGSizeMake(self.view.frame.size.width * numberOfViews, self.view.frame.size.height);
    [self.view addSubview:imageScrollView];
}

删除这 2 行

UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithCustomView:myButton];
[[self navigationItem] setRightBarButtonItem:button animated:YES];

没有必要这样做。这意味着您正在rightBarButton NavigationBar上设置该按钮，但在您的情况下，我认为您不想这样做。

Answer 2

在 for 循环中为 myButton 设置框架，类似于图像视图框架。

myButton.frame= CGRectMake(xOrigin, 0, self.myButton.frame.size.width, self.myButton.frame.size.height);