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但是当我添加第二个UIImageView时,我所拥有的图像位置已经获得了新值,并且新图像不会显示.
// load all the images from our bundle and add them to the scroll view for (i = 1; i <= kNumImages; i++) { NSString *imagename = [NSString StringWithFormat:@"image%d.jpg",i]; UIImage *image2 = [UIImage imagenamed:imagename]; UIImageView *imageView2 = [[UIImageView alloc] initWithImage:image2]; // setup each frame to a default height and width,it will be properly placed when we call "updateScrollList" CGRect rect = imageView2.frame; rect.size.height = imageviewScrollObjHeight; rect.size.width = imageviewScrollObjWidth; // Get the Layer of any view CALayer * imageLayer = [imageView2 layer]; [imageLayer setMasksToBounds:YES]; [imageLayer setCornerRadius:7.0]; // You can even add a border [imageLayer setBorderWidth:1.0]; [imageLayer setBorderColor:[[UIColor lightGrayColor] CGColor]]; imageView2.frame = rect; imageView2.tag = i; // tag our images for later use when we place them in serial fashion [scrollView1 addSubview:imageView2]; } [self layoutScrollImages]; // Now place the photos in serial layout within the scrollview
这是在每个页面上布局第一个图像的代码,每页不同的图像(在viewdidload之外)(工作正常):
// layout images for imageview1 - (void)layoutScrollImages { UIImageView *imageView = nil; NSArray *subviews = [scrollView1 subviews]; // reposition all image subviews in a horizontal serial fashion CGFloat curXLoc = 10; for (imageView in subviews) { if ([imageView isKindOfClass:[UIImageView class]] && imageView.tag > 0) { CGRect frame = imageView.frame; frame.origin = CGPointMake(curXLoc,50); imageView.frame = frame; curXLoc += (kScrollObjWidth); } } // set the content size so it can be scrollable [scrollView1 setContentSize:CGSizeMake((kNumImages * kScrollObjWidth),[scrollView1 bounds].size.height)]; }
这是第二个图像的代码(在viewdidload内部):(当我删除[self layoutNavScrollImages];图像只在第一页上加载)
for (i = 1; i <= kNumImages; i++) { UIImage *navBarImage = [UIImage imagenamed:@"navigationbar.png"]; UIImageView *imageViewNavBar = [[UIImageView alloc] initWithImage:navBarImage]; // setup each frame to a default height and width,it will be properly placed when we call "updateScrollList" CGRect navBarRect = imageViewNavBar.frame; navBarRect.size.height = 44; navBarRect.size.width = 320; navBarRect.origin.x = 0; navBarRect.origin.y = 0; /* Get the Layer of any view CALayer * imageLayer = [imageView3 layer]; [imageLayer setMasksToBounds:YES]; [imageLayer setCornerRadius:7.0]; // You can even add a border [imageLayer setBorderWidth:1.0]; [imageLayer setBorderColor:[[UIColor lightGrayColor] CGColor]]; */ imageViewNavBar.frame = navBarRect; imageViewNavBar.tag = i; // tag our images for later use when we place them in serial fashion [scrollView1 addSubview:imageViewNavBar]; } [self layoutNavScrollImages];
和viewdidload外的代码:(这会覆盖第一个图像的位置)
- (void)layoutNavScrollImages { UIImageView *view = nil; NSArray *subviews = [scrollView1 subviews]; // reposition all image subviews in a horizontal serial fashion CGFloat curXLoc = 0; for (view in subviews) { if ([view isKindOfClass:[UIImageView class]] && view.tag > 0) { CGRect frame = view.frame; frame.origin = CGPointMake(curXLoc,0); view.frame = frame; curXLoc += (kScrollObjWidth); } } // set the content size so it can be scrollable [scrollView1 setContentSize:CGSizeMake((kNumImages * kScrollObjWidth),[scrollView1 bounds].size.height)]; }
[@R_953_10586@lView addSubview:imageView1]; [@R_953_10586@lView addSubview:imageView2; [@R_953_10586@lView addSubview:buttonView1]; [@R_953_10586@lView addSubview:buttonView2]; [@R_953_10586@lView addSubview:webView]; [scrollView addSubview:@R_953_10586@lView];
请确保设置正确的内容大小或滚动视图不起作用:
[scrollView setContentSize:CGSizeMake((320*kNumImages),411)];
设置视图并标记UIView(在viewdidload内部):
NSUInteger i; for (i = 1; i <= kNumImages; i++) { //... code to setup views @R_953_10586@lView.tag = i; } [self layoutViews]; // Now place the views in serial layout within the scrollview
然后在每个页面上布局视图:
- (void)layoutViews { UIView *view = nil; NSArray *subviews = [scrollView subviews]; // reposition all image subviews in a horizontal serial fashion CGFloat curXLoc = 0; for (view in subviews) { if ([view isKindOfClass:[UIView class]] && view.tag > 0) { CGRect frame = view.frame; frame.origin = CGPointMake(curXLoc,0); view.frame = frame; curXLoc += (kScrollObjWidth); } } }
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