UIActivity user share, the thumbnail icon does not appear when you click the more button

Question

My support for iOS 7+ applications, I use UIActivity image size: 60pt for iPhone, 76pt for iOS for iPad,

When you click the more button to reorder items, it cannot display the icon in the list.

CODE as below:

class ZYShare { class ActivityItem { init() { self.title = "" self.icon = "" } var title: String? var icon: String? var type: ShareType = ShareTypeAny } class CommonActivity: UIActivity { lazy var itemInfo = ActivityItem() override func prepareWithActivityItems(activityItems: [AnyObject]) { // do something } override func canPerformWithActivityItems(activityItems: [AnyObject]) -> Bool { return true } override class func activityCategory() -> UIActivityCategory { return UIActivityCategory.Action } override func activityType() -> String? { return NSLocalizedString(itemInfo.title ?? "", comment: "") } override func activityTitle() -> String? { return NSLocalizedString(itemInfo.title ?? "", comment: "") } override func activityImage() -> UIImage? { println(itemInfo.icon) if let icon = itemInfo.icon { return UIImage(named: icon) } else { return nil } } override func performActivity() { ShareSDK.showShareViewWithType(itemInfo.type , container: nil , content: publishContent , statusBarTips: false , authOptions: authOptions , shareOptions: options , result: handle) self.activityDidFinish(true) } } class QQActivity: CommonActivity { override init() { super.init() self.itemInfo.icon = "ShareToQQ" self.itemInfo.title = "QQ" self.itemInfo.type = ShareTypeQQ } } class WeChatSessionActivity: CommonActivity { override init() { super.init() self.itemInfo.icon = "ShareToWeChat" self.itemInfo.title = "微信" self.itemInfo.type = ShareTypeWeixiSession } } class WeChatTimelineActivity: CommonActivity { override init() { super.init() self.itemInfo.icon = "ShareToWeChatTimeLine" self.itemInfo.title = "朋友圈" self.itemInfo.type = ShareTypeWeixiTimeline } } class QQSpaceActivity: CommonActivity { override init() { super.init() self.itemInfo.icon = "ShareToQzone" self.itemInfo.title = "QQ空间" self.itemInfo.type = ShareTypeQQSpace } } } 

Answer 1

Pretty old question, but maybe the solution is useful for others too!

In a subclass, UIActivity implements / overwrites a method

 - (UIImage *)activityImage { return [UIImage imageNamed:@"Activity Icon"]; } 

to return the image that will be displayed in the UIActivityViewController itself (as you did).

In addition to this, the implementation / overwrites the method

 - (UIImage *)activitySettingsImage { return [UIImage imageNamed:@"Activity Settings Icon"]; } 

to return an image (different or the same) that will be displayed in the larger / settings view.

I did not find the second method in the docs, but this is not the "_xx" method for UIAction, so I would suggest that it is not private ...

Answer 2

UIActivity has an undocumented property activitySettingsImage . The following code shows how to implement it using Swift 3 to display a thumbnail of your user activity in the Actions list:

 import UIKit class MyActivity: UIActivity { override var activityType: UIActivityType? { return UIActivityType(rawValue: String(describing: classForCoder)) } override var activityTitle: String? { return "My Activity Title" } override var activityImage: UIImage? { return UIImage(named: "icon") } var activitySettingsImage: UIImage? { return UIImage(named: "icon") } override class var activityCategory: UIActivityCategory { return .share } /* ... */ } 

Please note that you are not overriding activitySettingsImage to implement it in your code.