我正在使用UIActivityViewController分享文字，屏幕截图和网址。它适用于Twitter，电子邮件，短信等。事实上除了Facebook以外的一切。
据我了解，Facebook不再允许共享预填充文本，因此我希望只分享屏幕截图和网址。但是当用户选择Facebook时，出现的图像是直接从URL获取的图像而不是我指定的图像（即屏幕截图）。 {www.3}当我使用www.google.com作为网址时会发生什么。
如果我没有包含网址，那么屏幕截图看起来很好，但实际上它只是分享一张照片（这就是它在Facebook上显示的方式，说“John Doe添加了一张新照片”然后我的屏幕截图显示）。无论我是否登录Facebook应用程序，都会发生这种情况。
这是我的代码：
@IBAction func shareButton(sender: AnyObject) {
// Get screenshot
UIGraphicsBeginImageContextWithOptions(UIScreen.mainScreen().bounds.size, false, 0)
self.view.drawViewHierarchyInRect(view.bounds, afterScreenUpdates: true)
let screenshot:UIImage = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
let textToShare = "My text here"
let myWebsite = NSURL(string: "http://www.example.com/")
socialShare(sharingText: textToShare, sharingImage: screenshot, sharingURL: myWebsite)
}
然后：
func socialShare(sharingText sharingText: String?, sharingImage: UIImage?, sharingURL: NSURL?) {
var sharingItems = [AnyObject]()
if let text = sharingText {
sharingItems.append(text)
}
if let image = sharingImage {
sharingItems.append(image)
}
if let url = sharingURL {
sharingItems.append(url)
}
let activityViewController = UIActivityViewController(activityItems: sharingItems, applicationActivities: nil)
// Excluded sharing options
activityViewController.excludedActivityTypes = [UIActivityTypeCopyToPasteboard,UIActivityTypeAirDrop,UIActivityTypeAddToReadingList,UIActivityTypeAssignToContact,UIActivityTypePostToTencentWeibo,UIActivityTypePostToVimeo,UIActivityTypePrint,UIActivityTypePostToWeibo]
// The popover needs additional code to work on iPad, so distinguish between iPhone & iPad
if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiom.Phone) { // If iPhone
self.presentViewController(activityViewController, animated: true, completion: nil)
} else { // If iPad
let popoverCntlr = UIPopoverController(contentViewController: activityViewController)
popoverCntlr.presentPopoverFromRect(CGRectMake(self.view.frame.size.width - 40, 80, 0, 0), inView: self.view, permittedArrowDirections: UIPopoverArrowDirection.Up, animated: true) // position where the popover appears
}
}
那么有人知道如何使用UIActivityViewController通过Facebook分享屏幕截图和网址吗？我怀疑这个问题是由Facebook结束引起的，因为Twitter等一切正常，但是有解决方法吗？
答案 0 :(得分：0)
Facebook禁用了同时共享文字和图片的功能。
答案 1 :(得分：0)
我不完全确定这是来自Facebook方面。我在尝试发布网址和图片时遇到了完全相同的问题。我看到与您使用设备（包括您的屏幕截图）相同的行为，但它通过Xcode模拟器完美地工作。我没有在API中找到任何证据表明Facebook不会同时接受URL和照片。如果您可以验证相同，将会很有帮助。顺便说一句，我的Xcode版本是7.3
答案 2 :(得分：0)
我不确定截图，但我们可以与Facebook分享网址。更好的方法是对UIActivityItemProvider进行子类化，好处是我们还可以跟踪已挖掘的项目（活动）。我在这里粘贴了我的Objective-C代码，它可能对你有所帮助。
- (void)showShareSheetWithShareText:(NSString *)shareText onView:(UIViewController *)parentViewController{
@try {
if ([shareText length] == 0) {
shareText = @"Default Text";
}
dispatch_async(dispatch_get_main_queue(), ^{
ActivityItemProvider *activityItem = [[ActivityItemProvider alloc] initWithPlaceholderItem:shareText]; // Sub class of UIActivityItemProvider
UIActivityViewController *activityVC = [[UIActivityViewController alloc] initWithActivityItems:@[shareText, activityItem] applicationActivities:nil];
NSMutableArray *arrExcludeActivities = [[NSMutableArray alloc] initWithObjects:
UIActivityTypePostToWeibo,
UIActivityTypePrint,
UIActivityTypeCopyToPasteboard,
UIActivityTypeAssignToContact,
UIActivityTypeSaveToCameraRoll,
UIActivityTypeAirDrop,
UIActivityTypeAddToReadingList,
UIActivityTypePostToFlickr,
UIActivityTypePostToVimeo,
UIActivityTypeOpenInIBooks,
UIActivityTypePostToTencentWeibo, nil];
// @"com.apple.mobilenotes.SharingExtension",
// @"com.apple.reminders.RemindersEditorExtension"
activityVC.excludedActivityTypes = arrExcludeActivities;
if ([activityVC respondsToSelector:@selector(completionWithItemsHandler)]) {
activityVC.completionWithItemsHandler = ^(NSString *activityType, BOOL completed, NSArray *returnedItems, NSError *activityError) {
if (completed) {
// Log Events
}
else{
// Show error
}
};
}
else {
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
// Deprecated in iOS 8. Safe to hide deprecation warnings as the new completion handler is checked for above
activityVC.completionHandler = ^(UIActivityType __nullable activityType, BOOL completed){
// Write code for below iOS 8.
};
#pragma clang diagnostic pop
}
UIViewController *presentingViewController;
if (parentViewController && parentViewController != nil) {
presentingViewController = parentViewController;
}
else{
presentingViewController = [[[UIApplication sharedApplication].delegate window] rootViewController];
}
if (presentingViewController) {
// Required for iPad/Universal apps on iOS 8+
if ([presentingViewController respondsToSelector:@selector(popoverPresentationController)]) {
activityVC.popoverPresentationController.sourceView = presentingViewController.view;
}
[presentingViewController presentViewController:activityVC animated:YES completion:nil];
}
else {
NSLog(@"[warning, fatal] No view controller is present to show the share sheet. Aborting.");
}
});
}
@catch (NSException *exception) {
// Catch Exception
}
}
现在是.h头文件的UIActivityItemProvider子类
@interface ActivityItemProvider : UIActivityItemProvider
@end
和.m实施文件
@implementation ActivityItemProvider
- (id) initWithPlaceholderItem:(id)placeholderItem {
self = [super initWithPlaceholderItem:placeholderItem];
return self;
}
- (id)item {
NSString *channel = [ActivityItemProvider humanReadableChannelWithActivityType:self.activityType];
NSArray *scrapers = @[@"Facebook", @"Twitter", @"Slack", @"Apple Notes"];
for (NSString *scraper in scrapers) {
if ([channel isEqualToString:scraper]) {
// Do something for these Channels if you want.
}
}
return [NSURL URLWithString:@"Your Site URL"]; // return type should be NSURL else the activity does consider as a normal string.
}
+ (NSString *)humanReadableChannelWithActivityType:(NSString *)activityString {
NSString *channel = activityString; //default
NSDictionary *channelMappings = [[NSDictionary alloc] initWithObjectsAndKeys:
@"Facebook", UIActivityTypePostToFacebook,
@"Twitter", UIActivityTypePostToTwitter,
@"Weibo", UIActivityTypePostToWeibo, // May not use.
@"SMS", UIActivityTypeMessage,
@"Email", UIActivityTypeMail,
@"Print", UIActivityTypePrint,
@"Pasteboard", UIActivityTypeCopyToPasteboard,
@"Contact",UIActivityTypeAssignToContact,
@"CameraRoll", UIActivityTypeSaveToCameraRoll,
@"Reading List", UIActivityTypeAddToReadingList,
@"flickr", UIActivityTypePostToFlickr,
@"Vimeo", UIActivityTypePostToVimeo,
@"Tencent Weibo", UIActivityTypePostToTencentWeibo,
@"AirDrop",UIActivityTypeAirDrop,
@"Books",UIActivityTypeOpenInIBooks,
@"Apple Reminders", @"com.apple.reminders.RemindersEditorExtension",
@"Apple Notes", @"com.apple.mobilenotes.SharingExtension",
@"Slack", @"com.tinyspeck.chatlyio.share",
@"WhatsApp", @"net.whatsapp.WhatsApp.ShareExtension",
@"WeChat", @"com.tencent.xin.sharetimeline",
@"LINE", @"jp.naver.line.Share",
@"Pinterest", @"pinterest.ShareExtension",
nil
];
// Set to a more human readible string if we can identify it
if ([channelMappings objectForKey:activityString]) {
channel = channelMappings[activityString];
}
return channel; // [channel uppercaseString];
}
// For email subject
- (NSString *)activityViewController:(UIActivityViewController *)activityViewController subjectForActivityType:(nullable UIActivityType)activityType{
return @"Your Email Subject";
}
@end