Cocoa / Obj-C - 将其拖动到应用程序图标时打开文件 [英] Cocoa/Obj-C - Open file when dragging it to application icon

问题描述

目前我的应用程序界面上有一个按钮，可以打开一个文件，这里是我打开的代码：

在我的app.h：

   - （IBAction）selectFile：（id）sender; 
  

在我的app.m中：

  @synthesize window; 
 
  - （void）applicationDidFinishLaunching：（NSNotification *）aNotification {
 
} 
 
  - （IBAction）selectFile：（id）sender {
 
 NSOpenPanel * openPanel = [NSOpenPanel openPanel]; 
 NSArray * fileTypes = [NSArray arrayWithObjects：@xml，nil]; 
 
 NSInteger result = [openPanel runModalForDirectory：NSHomeDirectory（）file：nil types：fileTypes]; 
 
 if（result == NSOKButton）{
 
 NSString * input = [openPanel filename]; 
  

如何编辑我的代码以允许打开application-icon drag&下降？

注意：我编辑了.plist文件并为xml添加了一行，但它改变了任何东西，当我的文件被放在图标上时出错。

注2：我将文件 - >打开...链接到selectFile：参考我的代码

注意3：我的应用程序不是基于文档应用程序

感谢您的帮助！

Miskia

解决方案

首先在.plist文件中添加CFBundleDocumentTypes的正确扩展。

接下来实现以下代理：

- application：openFile：（删除一个文件）

- application：openFiles：多个文件已删除）

参考：

NSApplicationDelegate协议参考

回应评论：
$ b

一步一步的例子，希望它使一切清楚：）

添加到.plist文件：

 < key> CFBundleDocumentTypes< / key> 
< array> 
< dict> 
< key> CFBundleTypeExtensions< / key> 
< array> 
< string> xml< / string> 
< / array> 
< key> CFBundleTypeIconFile< / key> 
< string> application.icns< / string> 
< key> CFBundleTypeMIMETypes< / key> 
< array> 
< string> text / xml< / string> 
< / array> 
< key> CFBundleTypeName< / key> 
< string> XML文件< / string> 
< key> CFBundleTypeRole< / key> 
< string>查看器< / string> 
< key> LSIsAppleDefaultForType< / key> 
< true /> 
< / dict> 
< / array> 
  

添加到... AppDelegate.h

   - （BOOL）processFile：（NSString *）file; 
  - （IBAction）openFileManually：（id）sender; 
  

添加到... AppDelegate.m

   - （IBAction）openFileManually：（id）sender; 
 {
 NSOpenPanel * openPanel = [NSOpenPanel openPanel]; 
 NSArray * fileTypes = [NSArray arrayWithObjects：@xml，nil]; 
 NSInteger result = [openPanel runModalForDirectory：NSHomeDirectory（）file：nil types：fileTypes]; 
 if（result == NSOKButton）{
 [self processFile：[openPanel filename]]; 
} 
} 
 
  - （BOOL）application：（NSApplication *）theApplication openFile：（NSString *）filename 
 {
 return [self processFile：文件名]; 
} 
 
  - （BOOL）processFile：（NSString *）文件
 {
 NSLog（@以下文件已删除或选择：％@文件）; 
 //这里处理文件
 return YES; //当文件处理成功时返回YES，否则返回NO。 
} 
  

Currently there is a button on my app inteface which allow to open a file, here is my open code:

In my app.h:

- (IBAction)selectFile:(id)sender;

In my app.m:

@synthesize window;

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification {

}

- (IBAction)selectFile:(id)sender {

    NSOpenPanel *openPanel  = [NSOpenPanel openPanel];
    NSArray *fileTypes = [NSArray arrayWithObjects:@"xml",nil];

    NSInteger result  = [openPanel runModalForDirectory:NSHomeDirectory() file:nil types:fileTypes ];

    if(result == NSOKButton){

        NSString * input =  [openPanel filename];

How can I edit my code to allow opening with the application-icon drag & drop?
Note: I edited the .plist file and added a line for "xml" but it change anything, got an error when my file is dropped on the icon.
Note 2: I linked the "File -> Open..." to the selectFile: wich refer to my code
Note 3: My app isn't a document-based application

Thanks for your help!
Miskia

解决方案

First add the proper extensions to CFBundleDocumentTypes inside the .plist file.

Next implement the following delegates:
- application:openFile: (one file dropped)
- application:openFiles: (multiple files dropped)

Reference:
NSApplicationDelegate Protocol Reference

Response to comment:

Step by step example, hopefully it makes everything clear :)

Add to the .plist file:

 <key>CFBundleDocumentTypes</key>
        <array>
            <dict>
                <key>CFBundleTypeExtensions</key>
                <array>
                    <string>xml</string>
                </array>
                <key>CFBundleTypeIconFile</key>
                <string>application.icns</string>
                <key>CFBundleTypeMIMETypes</key>
                <array>
                    <string>text/xml</string>
                </array>
                <key>CFBundleTypeName</key>
                <string>XML File</string>
                <key>CFBundleTypeRole</key>
                <string>Viewer</string>
                <key>LSIsAppleDefaultForType</key>
                <true/>
            </dict>
        </array>

Add to ...AppDelegate.h

- (BOOL)processFile:(NSString *)file;
- (IBAction)openFileManually:(id)sender;

Add to ...AppDelegate.m

- (IBAction)openFileManually:(id)sender;
{
    NSOpenPanel *openPanel  = [NSOpenPanel openPanel];
    NSArray *fileTypes = [NSArray arrayWithObjects:@"xml",nil];
    NSInteger result  = [openPanel runModalForDirectory:NSHomeDirectory() file:nil types:fileTypes ];
    if(result == NSOKButton){
        [self processFile:[openPanel filename]];
    }
}

- (BOOL)application:(NSApplication *)theApplication openFile:(NSString *)filename
{
    return [self processFile:filename];
}

- (BOOL)processFile:(NSString *)file
{
    NSLog(@"The following file has been dropped or selected: %@",file);
    // Process file here
    return  YES; // Return YES when file processed succesfull, else return NO.
}

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