[Cocoa]NSWorkspace使用示例

NSWorkspace使用示例

罗朝辉 (http://www.cnblogs.com/kesalin/)

本文遵循“署名-非商业用途-保持一致”创作公用协议

NSWorkspace 为应用程序提供如下服务：

1）打开，操作文件/设备，获取文件/设备信息
2）跟踪文件，设备以及数据库的变动
3）设置或获取文件的 Finder 信息
4）启动应用程序。

NSWorkspace 是个 Singleton 类，我们通过 sharedWorkspace 来访问它。比如下面的语句用 TextEdit 打开指定的文件：
[[NSWorkspace sharedWorkspace] openFile:@"/Myfiles/README" withApplication:@"TextEdit"];

下面的代码演示了大部分 workspace 的应用，运行效果图如下：

下面来看代码，代码都很简单的：

- (IBAction) launchApplication:(id) sender
{
    NSWorkspace * workspace = [NSWorkspace sharedWorkspace];
    //BOOL wasLaunched = [workspace launchApplication:@"Safari"];
    
    // launch without activation
    //
    BOOL wasLaunched = [workspace launchAppWithBundleIdentifier: @"com.apple.Safari"
                                                        options: NSWorkspaceLaunchWithoutActivation
                                 additionalEventParamDescriptor: NULL
                                               launchIdentifier: nil];
    if ( wasLaunched )
        NSLog (@"Safari was launched");
    else
        NSLog (@"Safari was not launched");
    
    NSArray * apps = [workspace valueForKeyPath:@"launchedApplications.NSApplicationName"];
    self.launchedApplications = [NSString stringWithFormat:@"Launched Applications:\n%@", apps];
    NSLog(@"Launched Applications:\n%@", apps);
}

- (IBAction) openPdfByDefault:(id) sender
{
    NSString * path    = @"/Developer/About Xcode and iOS SDK.pdf";
    NSURL    * fileURL = [NSURL fileURLWithPath: path];
    
    NSWorkspace * workspace = [NSWorkspace sharedWorkspace];
    [workspace openURL: fileURL];
}

- (IBAction) openPdfBySafari:(id) sender
{
    NSString * path    = @"/Developer/About Xcode and iOS SDK.pdf";
    NSURL    * fileURL = [NSURL fileURLWithPath: path];
    
    NSWorkspace * workspace = [NSWorkspace sharedWorkspace];
    [workspace openFile:[fileURL path] withApplication:@"Safari"];
}

- (IBAction) selectFileInFinder:(id) sender
{
    NSString * path    = @"/Developer/About Xcode and iOS SDK.pdf";
    NSURL    * fileURL = [NSURL fileURLWithPath: path];
    
    NSWorkspace * workspace = [NSWorkspace sharedWorkspace];
    [workspace selectFile:[fileURL path] inFileViewerRootedAtPath:nil];
}

- (IBAction) gatherFileInfo:(id) sender
{
    NSString * path    = @"/Developer/About Xcode and iOS SDK.pdf";
    NSURL    * fileURL = [NSURL fileURLWithPath: path];
    
    NSWorkspace * workspace = [NSWorkspace sharedWorkspace];
    
    NSString    * appName;
    NSString    * fileType;
    
    [workspace getInfoForFile: [fileURL path]
                  application: &appName
                         type: &fileType];
    
    BOOL removable = NO;
    BOOL writeable = NO;
    BOOL unmountable = NO;
    NSString *description;
    NSString *fileSystemType;
    
    [workspace getFileSystemInfoForPath:[fileURL path]
                            isRemovable: &removable
                             isWritable: &writeable
                          isUnmountable: &unmountable
                            description: &description
                                   type: &fileSystemType];
    
    self.fileInfo = [NSString stringWithFormat:
                     @"AppName: %@\ntype: %@"
                     @"\nremoveable: %d\nwriteable: %d\nunmountable: %d"
                     @"\ndescription: %@\nfileSystemType: %@",
                     appName, fileType,
                     removable, writeable, unmountable,
                     description, fileSystemType];
    NSLog (@" >> gather file info:\n%@", self.fileInfo);
}

- (IBAction) copyFileToDesktop:(id) sender
{
    NSString * name  = @"About Xcode and iOS SDK.pdf";
    NSArray  * files = [NSArray arrayWithObject: name];
    
    NSWorkspace * workspace = [NSWorkspace sharedWorkspace];
    
    [workspace performFileOperation: NSWorkspaceCopyOperation
                             source: @"/Developer/"
                        destination: @"/Users/tianyouhui/Desktop/"
                              files: files
                                tag: 0];
}

- (IBAction) moveFileToTrash:(id) sender
{
    NSString * name  = @"About Xcode and iOS SDK.pdf";
    NSArray  * files = [NSArray arrayWithObject: name];
    
    NSWorkspace * workspace = [NSWorkspace sharedWorkspace];
    
    [workspace performFileOperation: NSWorkspaceRecycleOperation
                             source: @"/Users/tianyouhui/Desktop/"
                        destination: @""
                              files: files
                                tag: 0];
}

- (IBAction) gatherIconOfFile:(id) sender
{
    NSString * path    = @"/Developer/About Xcode and iOS SDK.pdf";
    NSURL    * fileURL = [NSURL fileURLWithPath: path];
    
    NSWorkspace * workspace = [NSWorkspace sharedWorkspace];

    self.icon = [workspace iconForFile: [fileURL path]];
    //NSString    * path  = [workspace fullPathForApplication:@"Safari"];
    //self.xcodeIcon  = [workspace iconForFile: path];

    self.xcodeIcon = [workspace iconForFileType:@"xcodeproj"];
}

- (IBAction) openUrlBySafari:(id) sender
{
    NSURL * url = [NSURL URLWithString:@"http://blog.csdn.net/kesalin/"];
    
    NSWorkspace * workspace = [NSWorkspace sharedWorkspace];

    [workspace openURL: url];
}