iOS 7 之Airdrop 分享 URLs ,Media and Documents

Sharing URLs 

Open URLViewController.m and modify the implementation as shown below: 

- (void)loadURL:(NSURL *)URL{

self.objectsToShare = @[URL];

... the rest of the code ...

}

- (BOOL)webView:(UIWebView *)webViewshouldStartLoadWithRequest:(NSURLRequest *)requestnavigationType:(UIWebViewNavigationType)navigationType{

if (navigationType == UIWebViewNavigationTypeLinkClicked){

self.textField.text = request.URL.absoluteString;

self.objectsToShare = @[request.URL];}

return YES;} 

The above code is similar to the previous implementation, but this time you’re usingan NSURL in objectsToShare; in this case since you are passing a web URL,AirDrop will launch Safari on the receiving device. 

Sharing media and documents 

Open ImageViewController.m and replace the implementation ofimagePickerController:didFinishPickingMediaWithInfo: with the following: 

- (void)imagePickerController:(UIImagePickerController *)pickerdidFinishPickingMediaWithInfo:(NSDictionary *)info
{

// What did user pick? Is it a movie or is it an image?

NSString *mediaType = info[UIImagePickerControllerMediaType];

// If it is an image...

if ([mediaType isEqualToString:(NSString *)kUTTypeImage]){

// Update UI and the object to share.

self.imageView.image =info[UIImagePickerControllerOriginalImage];

self.objectsToShare =@[info[UIImagePickerControllerOriginalImage]];

}

// else, if it is a movie...

else if ([mediaType isEqualToString:(NSString *)kUTTypeMovie]){

// Get the URL to the movie for sharing

NSURL *assetURL = info[UIImagePickerControllerMediaURL];self.objectsToShare = @[assetURL];

// Update UI by taking a snapshot of the movie.

self.imageView.image = [selfsnapshotFromMovieAtURL:assetURL];

}

// Dismiss the picker.

[picker dismissViewControllerAnimated:YES completion:nil];} 

When the standard image picker returns — either from the camera or the photolibrary — the code then callsimagePickerController:didFinishPickingMediaWithInfo: with the media assetinformation. 

机制

For an image, the UIImagePickerControllerOriginalImage key leads to aUIImage object. An image preview is displayed on screen, and the image itself isadded to objectsToShare.