使用Cocoa为文件夹创建图标

Question

在我的Mac OS应用程序中,我提示用户创建一个新文件夹.我想在创建时使用Cocoa将一个图标应用于此文件夹.目前,要创建该文件夹,我使用以下代码:

- (IBAction)browseFiles:(id)sender
{
    NSOpenPanel *oPanel = [[NSOpenPanel openPanel] retain];
    [oPanel setCanChooseDirectories:YES];
    [oPanel setCanChooseFiles:NO];
    [oPanel setDelegate:self];
    [oPanel setCanCreateDirectories:YES];
    [oPanel beginSheetForDirectory:NSHomeDirectory()
                              file:nil
                             types:nil
                    modalForWindow:nil
                     modalDelegate:self
                    didEndSelector:@selector(filePanelDidEnd:
                                             returnCode:
                                             contextInfo:)
                       contextInfo:nil];
}

选择目录后,用户单击使用以下方法调用函数的确认按钮:

bool set = [[NSWorkspace sharedWorkspace] setIcon:[NSImage imageNamed:@"icon.icns"] forFile:path options:NSExcludeQuickDrawElementsIconCreationOption]; 

虽然上面的代码确实返回"YES",但图标未成功应用于该文件夹.我在代码中做错了吗？

谢谢.

Answer 1

这种NSWorkspace方法就像一个魅力.也许你的图标格式无效？
我尝试setIcon:使用Finder图标:

- (IBAction)setFolderIcon:(id)sender
{
    NSOpenPanel* openPanel = [NSOpenPanel openPanel];
    [openPanel setCanChooseFiles:NO];
    [openPanel setCanChooseDirectories:YES];
    switch([openPanel runModal])
    {
        case NSFileHandlingPanelOKButton:
        {
            NSURL* directoryURL = [openPanel directoryURL];
            NSImage* iconImage = [[NSImage alloc] initWithContentsOfFile:@"/System/Library/CoreServices/Finder.app/Contents/Resources/Finder.icns"];
            BOOL didSetIcon = [[NSWorkspace sharedWorkspace] setIcon:iconImage forFile:[directoryURL path] options:0];
            NSLog(@"%d", didSetIcon);
            [iconImage release];
        }
        case NSFileHandlingPanelCancelButton:
        {
            return;
        }
    }
}