［已解决］swift中将多次操作合并到一次处理

希望将此处的，多次的save 一个东西的操作：

    func storeData(){
        dispatchBackground_async({
            calcTimeStart("StoreConversationItemList")
            if self.lastSavedConversationItemCount != self.conversationItemList.count {
               self.lastSavedConversationItemCount = self.conversationItemList.count

                //save conversation item into disk for next run app restore
                if let saveFilePath = getSaveFilePath(ArchiveConversationDir, saveFilename: "conversationItemList") {
                    let saveOk = NSKeyedArchiver.archiveRootObject(self.conversationItemList, toFile: saveFilePath)
                    gLog.info("save conversationItemList \(saveOk) for \(self.conversationItemList.count) items to \(saveFilePath)")
                }
            } else {
                gLog.debug("not saved due to same count of conversation item list")
            }

calcTimeEnd("StoreConversationItemList")
})

}

合并到一次处理

尤其是发现，之前多次调用的话，其实都是保存的动作，则可以合并为单次的保存即可。

swift merge multiple operation to single

swift multiple operation to single

NSOperation and NSOperationQueue Tutorial in Swift

Core Data Tutorial: Multiple Managed Object Contexts

NSOperationQueue Class Reference

nsoperationqueue 用法

先是用：

var storeDataTimer:NSTimer

self.storeDataTimer = NSTimer()

func resetStoreDataTimer(){

self.storeDataTimer = NSTimer.scheduledTimerWithTimeInterval(ArchiveSmartSaveDelayTimeInSec, target: self, selector:#selector(ConversationViewController.reallyStoreData), userInfo: nil, repeats: false)

    }

    func storeData(){
        if self.storeDataTimer.valid {
            gLog.debug("duplicated call to store data for conversationItemList, so just restart timer")
            self.storeDataTimer.invalidate()
        }

resetStoreDataTimer()

}

    func reallyStoreData(){
        dispatchBackground_async({
            calcTimeStart("StoreConversationItemList")
            //save conversation item into disk for next run app restore
            if let saveFilePath = getSaveFilePath(ArchiveConversationDir, saveFilename: "conversationItemList") {
                let saveOk = NSKeyedArchiver.archiveRootObject(self.conversationItemList, toFile: saveFilePath)
                gLog.info("save conversationItemList \(saveOk) for \(self.conversationItemList.count) items to \(saveFilePath)")
            }
            calcTimeEnd("StoreConversationItemList")
        })

}

最后是用：

import UIKit

class CommonUtil:NSObject {
var smartSaveDict:[String:NSTimer] = [String:NSTimer]()

    override init() {
        self.smartSaveDict = [String:NSTimer]()
    }

    func smartSaveData(uniqueId:String, target: AnyObject, reallySaveData:Selector){
        gLog.debug("uniqueId=\(uniqueId), target=\(target), reallySaveData=\(reallySaveData)")

        if smartSaveDict.keys.contains(uniqueId) {
            let curTimer = smartSaveDict[uniqueId]!
            gLog.debug("found existed timer \(curTimer) for \(uniqueId), its current fireDate=\(curTimer.fireDate)")

            if curTimer.valid {
                gLog.debug("invalidate \(curTimer) for \(uniqueId)")
                curTimer.invalidate()
            }

            let resetedTimer = NSTimer.scheduledTimerWithTimeInterval(ArchiveSmartSaveDelayTimeInSec, target: target, selector:reallySaveData, userInfo: nil, repeats: false)
            gLog.debug("reset timer \(resetedTimer) for \(uniqueId)")
            //save new timer
            smartSaveDict[uniqueId] = resetedTimer
        } else {
            var newTimer = NSTimer()
            newTimer = NSTimer.scheduledTimerWithTimeInterval(ArchiveSmartSaveDelayTimeInSec, target: target, selector:reallySaveData, userInfo: nil, repeats: false)
            gLog.debug("create and save new timer \(newTimer) for \(uniqueId)")
            smartSaveDict[uniqueId] = newTimer
        }
    }

}

var gCommonUtil:CommonUtil!

func resetCommonUtil() -> CommonUtil {

gCommonUtil = CommonUtil()
return gCommonUtil
}

func SingletonCommonUtil() -> CommonUtil {
    if gCommonUtil == nil {
        resetCommonUtil()
    }

    return gCommonUtil

}

    func storeData(){
        SingletonCommonUtil().smartSaveData("conversationItemList", target: self, reallySaveData: #selector(ConversationViewController.reallyStoreData))
    }

}

去避免多次执行同一个重复动作。

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［已解决］swift中将多次操作合并到一次处理

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