xcode 在另一个应用程序中共享/发送文件（iOS 中的“打开方式”）
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File sharing / send file in another app ("open in" in iOS)
提问by dams net
my app make a simple file called log.txt
我的应用程序制作了一个名为 log.txt 的简单文件
the URL of this file (viewed in xcode) is file://localhost/var/mobile/Applications/NUMBER OF THE APPLICATION/Documents/log.txt
此文件的 URL（在 xcode 中查看）是 file://localhost/var/mobile/Applications/ 应用程序数量/Documents/log.txt
So I can see this file in the finder ...
所以我可以在查找器中看到这个文件......
I wanted to add the "open in" feature to my app to provide the user to share this file (via mail or imessage) or open this file in another compatible app.
我想在我的应用程序中添加“打开方式”功能，以便用户共享此文件（通过邮件或 imessage）或在另一个兼容的应用程序中打开此文件。
Here is what I do :
这是我所做的：
-(void) openDocumentIn {
NSURL *fileURL = [[NSURL alloc] initFileURLWithPath:docFile]; //docFile is the path
//NSLog(@"%@",fileURL); // -> shows the URL in the xcode log window
UIDocumentInteractionController *documentController = [UIDocumentInteractionController interactionControllerWithURL:fileURL];
documentController.delegate = self;
documentController.UTI = @"public.text";
[documentController presentOpenInMenuFromRect:CGRectZero
inView:self.view
animated:YES];
}
Then the call to this function :
然后调用这个函数：
-(IBAction)share:(id)sender {
[self openDocumentIn];
}
When I run the app, I click on this "share" button, but nothing appends except showing me the path of the URL in the log window ...
当我运行该应用程序时，我单击了这个“共享”按钮，但除了在日志窗口中向我显示 URL 的路径外，没有任何附加内容......
I missed something ...
我错过了一些东西......
Thanks
谢谢
EDIT : finally, it works on my real iphone ... there was no text viewer in the simulator !!! --'
编辑：最后，它适用于我真正的 iphone ......模拟器中没有文本查看器！！！——”
EDIT 2 : it shows the apps that are available (pages, bump ...) but crashes finally :((( ! see here for the crash picture
编辑 2：它显示了可用的应用程序（页面、碰撞...）但最终崩溃了 :((（！请看这里的崩溃图片
回答by fzaziz
Its a memory management issue. The main reason it crashes is because the object is not retained. Thats why if you declare it in the .h file and write an @property for retain when you do assign it the object gets retained.
它是一个内存管理问题。它崩溃的主要原因是没有保留对象。这就是为什么如果你在 .h 文件中声明它并在你分配它时为保留写一个 @property 对象被保留。
So in your interface file (.h) you should have
所以在你的接口文件（.h）中你应该有
@property (retain)UIDocumentInteractionController *documentController;
Then in your .m (implementation file) you can do
然后在您的 .m （实现文件）中，您可以执行
@synthesize documentController;
- (void)openDocumentIn{
// Some code here
self.documentController = [UIDocumentInteractionController interactionControllerWithURL:fileURL];
documentController.delegate = self;
documentController.UTI = @"public.text";
[documentController presentOpenInMenuFromRect:CGRectZero
inView:self.view
animated:YES];
// Some more stuff
}
回答by dams net
Here is how it works for me :
这是它对我的工作方式：
I just put the declaration "UIDocumentInteractionController *documentController" in the .h file and it works !
我只是将声明“UIDocumentInteractionController *documentController”放在 .h 文件中，它可以工作！
I really don't know why, but ....
我真的不知道为什么，但是......
