我正在 iOS 10 中尝试贴纸 iMessage 应用程序,但遇到了问题override func didStartSending(_ message: MSMessage, conversation: MSConversation)
中的方法MSMessagesAppViewController
。当从贴纸上“剥离”贴纸时MSStickerView
,我希望收到某种回调didStartSending
方法。但事实似乎并非如此。有谁知道这是否是预期的行为和/或是否有另一种方法可以订阅这些贴纸被剥离、拖动并放入时的回调MSConversation
?我意识到didStartSending
是为用户点击发送按钮时保留的,但肯定应该有some知道用户何时拖动 MSStickers 的方法,而无需将一些 UIView 拖动/直读启发式组合在一起。
消息视图控制器:
class MessagesViewController: MSMessagesAppViewController {
var nYCStickersBroswerViewController: NYCStickersBroswerViewController!
override func viewDidLoad() {
super.viewDidLoad()
nYCStickersBroswerViewController = NYCStickersBroswerViewController(stickerSize: .regular)
nYCStickersBroswerViewController.view.frame = self.view.frame
self.addChildViewController(nYCStickersBroswerViewController)
nYCStickersBroswerViewController.didMove(toParentViewController: self)
self.view.addSubview(nYCStickersBroswerViewController.view)
nYCStickersBroswerViewController.loadStickers()
nYCStickersBroswerViewController.stickerBrowserView.reloadData()
}
...
override func didStartSending(_ message: MSMessage, conversation: MSConversation) {
// Called when the user taps the send button.
print(message) // should this not contain the sticker that is peeled, dragged, and dropped into the conversation?
}
}
贴纸浏览器:
import Foundation
import UIKit
import Messages
class ASSticker: MSSticker {
var identifier: String?
}
class NYCStickersBroswerViewController: MSStickerBrowserViewController {
var stickers = [ASSticker]()
override func viewDidLoad() {
super.viewDidLoad()
}
func changeBrowswerViewBackgroundColor(color: UIColor) {
stickerBrowserView.backgroundColor = color
}
func loadStickers() {
createSticker(name: "brooklyn", localizedDescription: "Brooklyn Bridge Sticker")
createSticker(name: "liberty", localizedDescription: "Statue of Liberty Sticker")
createSticker(name: "love", localizedDescription: "I Love New York Sticker")
createSticker(name: "mets", localizedDescription: "New York Mets Sticker")
createSticker(name: "rangers", localizedDescription: "New York Rangers Sticker")
createSticker(name: "subway", localizedDescription: "New York City MTA Subway Train Sticker")
}
func createSticker(name: String, localizedDescription: String) {
guard let stickerPath = Bundle.main.pathForResource(name, ofType: "png") else {
print("Call ae cab, you're intoxicated.")
return
}
let stickerURL = URL(fileURLWithPath: stickerPath)
let sticker: ASSticker
do {
try sticker = ASSticker(contentsOfFileURL: stickerURL, localizedDescription: localizedDescription)
sticker.identifier = "something unique"
stickers.append(sticker)
} catch {
print("Call a cab, you're intoxicated.")
}
}
override func numberOfStickers(in stickerBrowserView: MSStickerBrowserView) -> Int {
return self.stickers.count
}
override func stickerBrowserView(_ stickerBrowserView: MSStickerBrowserView, stickerAt index: Int) -> MSSticker {
return self.stickers[index]
}
}