我使用AES算法加密图像。当我在IKImageBrowserView
中使用此图像时,它正确显示图像,但我无法将图像拖放到粘贴板。
我已将图像表示设置为IKImageBrowserView
像这样的图像对象
- (NSString *) imageRepresentationType
{
return IKImageBrowserNSDataRepresentationType;
}
- (id) imageRepresentation
{
return [[NSData dataWithContentsOfFile:path]decryptWithString:PASS];
}
但是当我这样做时它的工作
- (NSString *) imageRepresentationType
{
return IKImageBrowserPathRepresentationType;
}
- (id) imageRepresentation
{
return path;
}
上面的代码正在运行,因为当我从IKImageBrowserView
拖动图片时,它会返回
图像的路径。
现在我需要做的是将IKImageBrowserView
中的加密图像拖放到粘贴板。
答案 0 :(得分:0)
最后我明白了。
对于非文件路径表示的图像,我们需要实现 - imageBrowser:writeItemsAtIndexes:toPasteboard:
- (NSUInteger) imageBrowser:(IKImageBrowserView *) aBrowser writeItemsAtIndexes:(NSIndexSet *) itemIndexes toPasteboard: (NSPasteboard *)pasteboard
{
NSUinteger index;
//instantiate an array to store paths
filesArray = [NSMutableArray array];
//for each index...
for(index = [itemIndexes firstIndex]; index != NSNotFound; index = [itemIndexes indexGreaterThanIndex:index]){
//...get the path you want to add to the pasteboard
id myDatasourceItem = [_myDatasourceArray objectAtIndex:index];
NSString *path = [myDatasourceItem myLargeImageFilePath];
//add it to your array
[filesArray addObject:path];
}
//declare the pasteboard will contain paths
[pasteboard declareTypes:[NSArray arrayWithObjects:NSFilenamesPboardType,nil] owner:self];
//set the paths
[pasteboard setPropertyList:filesArray forType:NSFilenamesPboardType];
//return the number of items added to the pasteboard
return [filesArray count];
}