盤旋迴收這件事。我最終從通用的UIActivityViewController切換到定製每種服務類型的系統。我使用Bob de Graaf的BDGShare。我建立了應用程序支持的服務列表，爲每個服務顯示一個按鈕，然後顯示一個切換到每種類型的共享。萬一有人在研究這個，這是我想出了：
類型的共享應用程序要支持：
public enum ShareServiceType:Int {
case iMessage=0, facebook, twitter, instagram, whatsApp, facebookMessenger, email, more
}
類存儲有關共享服務的類型信息
public class ShareTargetVO: NSObject
{
var icon:String!
var label:String!
var type:ShareServiceType
init(serviceType:ShareServiceType, icon:String, label:String)
{
self.type = serviceType
self.icon = icon
self.label = label
}
}
在我的社交網絡輔助函數來填充可用服務的列表：
static func getShareTargetList(for sticker : ReeSticker) -> [ShareTargetVO] {
var services:Array<ShareTargetVO> = []
// Check to see which capabilities are present and add buttons
if (BDGShare.shared().isAvailable(forServiceType: SLServiceTypeFacebook)) {
services.append(ShareTargetVO(serviceType: ShareServiceType.facebook, icon: "Icon-Share-Facebook", label: "Facebook"))
}
// Checking for facebook service type because there's no availability check with FBSDK for messenger (could be rolled into the lib)
if (BDGShare.shared().isAvailable(forServiceType: SLServiceTypeFacebook) && !sticker.type.doesContain("video")) {
services.append(ShareTargetVO(serviceType: ShareServiceType.facebookMessenger, icon: "Icon-Share-Messenger", label: "Messenger"))
}
if (BDGShare.shared().isAvailable(forServiceType: SLServiceTypeTwitter)) {
services.append(ShareTargetVO(serviceType: ShareServiceType.twitter, icon: "Icon-Share-Twitter", label: "Twitter"))
}
if (BDGShare.shared().canSendSMS()) {
services.append(ShareTargetVO(serviceType: ShareServiceType.iMessage, icon: "Icon-Share-Messages", label: "Messages"))
}
if UIApplication.shared.canOpenURL(URL(string: "whatsapp://")! as URL) && !sticker.type.contains("video") {
services.append(ShareTargetVO(serviceType: ShareServiceType.whatsApp, icon: "Icon-Share-Whatsapp", label: "What's App?"))
}
if UIApplication.shared.canOpenURL(URL(string: "instagram://app")! as URL) && !sticker.type.contains("video") {
services.append(ShareTargetVO(serviceType: ShareServiceType.instagram, icon: "Icon-Share-Instagram", label: "Instagram"))
}
if (BDGShare.shared().canSendEmail()) {
services.append(ShareTargetVO(serviceType: ShareServiceType.email, icon: "Icon-Share-Mail", label: "Email"))
}
services.append(ShareTargetVO(serviceType: ShareServiceType.more, icon: "Icon-Share-More", label: "More"))
return services
}
在我的視圖控制器的函數來填充按鈕的UICollectionView共享限制爲從列表中函數返回這些服務：
func layoutShareButtons() {
let f = self.view.frame
let btnWidth = f.width * 0.82
let bannerWidth = btnWidth + 10
mask = UIView(frame: CGRect(x: 0, y: 0, width: f.width, height: f.height))
mask.backgroundColor = .black
mask.alpha = 0.3
self.view.addSubview(mask)
buttonList = SocialHelper.getShareTargetList(for: self.sticker)
let buttonGridLayout = UICollectionViewFlowLayout()
buttonGridLayout.sectionInset = UIEdgeInsets(top: 5, left: 5, bottom: 5, right: 5)
buttonGridLayout.itemSize = CGSize(width: 60, height: 60)
buttonGridLayout.scrollDirection = .horizontal
buttonListView = UICollectionView(frame: CGRect(x: (f.width - bannerWidth)/2,
y: self.preview.frame.origin.y + self.preview.frame.height + 10,
width: bannerWidth,
height: 80),
collectionViewLayout: buttonGridLayout)
buttonListView.register(ShareButtonCell.self, forCellWithReuseIdentifier: "shareButtonCell")
buttonListView.dataSource = self
buttonListView.delegate = self
self.view.addSubview(buttonListView)
// cancel button for sharing view
// Button (added last to ensure it's on top of the z-order)
cancelButton = SimpleButton(frame: CGRect(x: (f.width - bannerWidth)/2, y: self.buttonListView.frame.origin.y + self.buttonListView.frame.height + 10, width: bannerWidth, height: 52))
cancelButton.backgroundColor = UIColor(netHex:0x202020)
cancelButton.layoutComponent(0, label: "Cancel")
cancelButton.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(self.cancelButtonPressed(_:))))
self.view.addSubview(self.cancelButton)
}
UICollectionView didSelect處理程序（根據您的應用程序更好的SoC刪除「份額「功能，一個單獨的類只是份額實現，在此應用程序，我們正在使用的屏幕是專門爲共享）：
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
self.share(shareTarget: buttonList[indexPath.row])
}
最後一個函數調用正確的共享類型：
func share(shareTarget: ShareTargetVO) {
// Params to submit to service
self.shareUrl = self.sticker.getStickerURL()
let textStr = "" // BDGShare supports a message passed in as well but we just send the sticker
// we need the NSData either way (sticker/video)
var ok = true
// try? is fine here because result is tested below
let urlData : Data? = try? Data(contentsOf: self.shareUrl as URL)
ok = (urlData != nil)
var img: UIImage? = nil
// if it's an image type then get it
if ok {
if (self.shareUrl.pathExtension.contains("png")) || (self.shareUrl.pathExtension.contains("jpg")) {
img = UIImage(data: urlData! as Data)
ok = (img != nil)
}
}
if !ok {
let alertCtrl = UIAlertController(title: "Error sending", message: "There was an error gathering the information for sending this sticker.", preferredStyle: .alert)
alertCtrl.addAction(UIAlertAction(title: "OK", style: UIAlertActionStyle.default, handler: nil))
self.present(alertCtrl, animated: true, completion: nil)
return
}
switch shareTarget.type
{
case .iMessage:
BDGShare.shared().shareSMS(textStr, recipient: nil, image: img, data:urlData! as Data, imageName: "sendSticker.png", completion: {(SharingResult) -> Void in
// Handle share result...
self.handleShareResult(shareTarget.type, shareResult: SharingResult)
})
break
case .facebook:
BDGShare.shared().shareFacebook("", urlStr: "", image: img, completion: {(SharingResult) -> Void in
// Handle share result...
self.handleShareResult(shareTarget.type, shareResult: SharingResult)
})
break
case .twitter:
... more code for handling each type of share
}
}
所以我使用BDGShare來實現UIActivityViewController。順便說一句 - 列表末尾的「更多」選項會調用該UIActivityViewController，因此如果用戶願意，它仍然可供用戶使用。
HTH，Mike