[Cocoa] NSWorkspace 使用示例

http://blog.csdn.net/kesalin/article/details/6749107

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：

[cpp] view plaincopyprint?

1. - (IBAction) launchApplication:(id) sender
2. {
3. NSWorkspace * workspace = [NSWorkspace sharedWorkspace];
4. //BOOL wasLaunched = [workspace launchApplication:@"Safari"];
5. // launch without activation
6. //
7. BOOL wasLaunched = [workspace launchAppWithBundleIdentifier: @"com.apple.Safari"
8. options: NSWorkspaceLaunchWithoutActivation
9. additionalEventParamDescriptor: NULL
10. launchIdentifier: nil];
11. if ( wasLaunched )
12. NSLog (@"Safari was launched");
13. else
14. NSLog (@"Safari was not launched");
15. NSArray * apps = [workspace valueForKeyPath:@"launchedApplications.NSApplicationName"];
16. self.launchedApplications = [NSString stringWithFormat:@"Launched Applications:\n%@", apps];
17. NSLog(@"Launched Applications:\n%@", apps);
18. }
19. - (IBAction) openPdfByDefault:(id) sender
20. {
21. NSString * path    = @"/Developer/About Xcode and iOS SDK.pdf";
22. NSURL    * fileURL = [NSURL fileURLWithPath: path];
23. NSWorkspace * workspace = [NSWorkspace sharedWorkspace];
24. [workspace openURL: fileURL];
25. }
26. - (IBAction) openPdfBySafari:(id) sender
27. {
28. NSString * path    = @"/Developer/About Xcode and iOS SDK.pdf";
29. NSURL    * fileURL = [NSURL fileURLWithPath: path];
30. NSWorkspace * workspace = [NSWorkspace sharedWorkspace];
31. [workspace openFile:[fileURL path] withApplication:@"Safari"];
32. }
33. - (IBAction) selectFileInFinder:(id) sender
34. {
35. NSString * path    = @"/Developer/About Xcode and iOS SDK.pdf";
36. NSURL    * fileURL = [NSURL fileURLWithPath: path];
37. NSWorkspace * workspace = [NSWorkspace sharedWorkspace];
38. [workspace selectFile:[fileURL path] inFileViewerRootedAtPath:nil];
39. }
40. - (IBAction) gatherFileInfo:(id) sender
41. {
42. NSString * path    = @"/Developer/About Xcode and iOS SDK.pdf";
43. NSURL    * fileURL = [NSURL fileURLWithPath: path];
44. NSWorkspace * workspace = [NSWorkspace sharedWorkspace];
45. NSString    * appName;
46. NSString    * fileType;
47. [workspace getInfoForFile: [fileURL path]
48. application: &appName
49. type: &fileType];
50. BOOL removable = NO;
51. BOOL writeable = NO;
52. BOOL unmountable = NO;
53. NSString *description;
54. NSString *fileSystemType;
55. [workspace getFileSystemInfoForPath:[fileURL path]
56. isRemovable: &removable
57. isWritable: &writeable
58. isUnmountable: &unmountable
59. description: &description
60. type: &fileSystemType];
61. self.fileInfo = [NSString stringWithFormat:
62. @"AppName: %@\ntype: %@"
63. @"\nremoveable: %d\nwriteable: %d\nunmountable: %d"
64. @"\ndescription: %@\nfileSystemType: %@",
65. appName, fileType,
66. removable, writeable, unmountable,
67. description, fileSystemType];
68. NSLog (@" >> gather file info:\n%@", self.fileInfo);
69. }
70. - (IBAction) copyFileToDesktop:(id) sender
71. {
72. NSString * name  = @"About Xcode and iOS SDK.pdf";
73. NSArray  * files = [NSArray arrayWithObject: name];
74. NSWorkspace * workspace = [NSWorkspace sharedWorkspace];
75. [workspace performFileOperation: NSWorkspaceCopyOperation
76. source: @"/Developer/"
77. destination: @"/Users/tianyouhui/Desktop/"
78. files: files
79. tag: 0];
80. }
81. - (IBAction) moveFileToTrash:(id) sender
82. {
83. NSString * name  = @"About Xcode and iOS SDK.pdf";
84. NSArray  * files = [NSArray arrayWithObject: name];
85. NSWorkspace * workspace = [NSWorkspace sharedWorkspace];
86. [workspace performFileOperation: NSWorkspaceRecycleOperation
87. source: @"/Users/tianyouhui/Desktop/"
88. destination: @""
89. files: files
90. tag: 0];
91. }
92. - (IBAction) gatherIconOfFile:(id) sender
93. {
94. NSString * path    = @"/Developer/About Xcode and iOS SDK.pdf";
95. NSURL    * fileURL = [NSURL fileURLWithPath: path];
96. NSWorkspace * workspace = [NSWorkspace sharedWorkspace];
97. self.icon = [workspace iconForFile: [fileURL path]];
98. //NSString    * path  = [workspace fullPathForApplication:@"Safari"];
99. //self.xcodeIcon  = [workspace iconForFile: path];
100. self.xcodeIcon = [workspace iconForFileType:@"xcodeproj"];
101. }
102. - (IBAction) openUrlBySafari:(id) sender
103. {
104. NSURL * url = [NSURL URLWithString:@"http://blog.csdn.net/kesalin/"];
105. NSWorkspace * workspace = [NSWorkspace sharedWorkspace];
106. [workspace openURL: url];
107. }