IOS应用源码之bjhomer-HSImageSidebarView-44c00dc.zip

HSImageSidebarView ================== `HSImageSidebarView` is a subclass of `UIView` for displaying a collection of images. The images are arranged either horizontally or vertically, depending on the dimensions of the view. It supports selection, scrolling, drag-and-drop rearranging, and drag-and-drop deletion. The API is patterned after `UITableView`, so it will be familiar to Cocoa Touch programmers. HSImageSidebarView works with both iPad and iPhone interface idioms.  An `HSImageSidebarView` is created using the standard `initWithFrame:` method on `UIView`. // Create an 80-pixel sidebar on the left side of the screen HSImageSidebarView *sidebar = [[HSImageSidebarView alloc] initWithFrame:CGRectMake(0, 0, 80, 1004)]; sidebar.delegate = self; [parentView addSubview:sidebar]; [sidebar release]; It can also be created in Interface Builder by adding a `UIView` and then setting its class (in IB) to `HSImageSidebarView`. The image sidebar receives all its information through delegate methods. The two required methods are these: - (NSUInteger)countOfImagesInSidebar:(HSImageSidebarView *)sidebar; - (UIImage *)sidebar:(HSImageSidebarView *)sidebar imageForIndex:(NSUInteger)anIndex; When a user taps, moves, or deletes an image, the delegate can be notified through one of these methods: - (void)sidebar:(HSImageSidebarView *)sidebar didTapImageAtIndex:(NSUInteger)anIndex; - (void)sidebar:(HSImageSidebarView *)sidebar didMoveImageAtIndex:(NSUInteger)oldIndex toIndex:(NSUInteger)newIndex; - (void)sidebar:(HSImageSidebarView *)sidebar didRemoveImageAtIndex:(NSUInteger)anIndex; `HSImageSidebarView` requires iOS 4.0 or later. A sample project is included to demonstrate usage. To Do ----- The following are features which I would like to see added, but which haven't been completed yet: - Expose selection color property - Enable/disable drag-to-move - Enable/disable drag-to-delete - Be smarter about calculating the image frame when the the aspect fit doesn't fill the whole frame. (This mostly applies when trying to position a popover correctly.) - Add support for indentation levels - Add support for numbering images - Add support for multiple selection