2025年知識競賽-iOS面試知識競賽歷年參考題庫含答案解析(5套典型考題)2025年知識競賽-iOS面試知識競賽歷年參考題庫含答案解析(篇1)【題干1】在Swift中，如何正確實現(xiàn)協(xié)議擴(kuò)展？【選項】A.協(xié)議定義后直接擴(kuò)展B.協(xié)議定義前擴(kuò)展C.協(xié)議定義后使用@objc修飾符D.協(xié)議定義后使用@objcextension【參考答案】C【詳細(xì)解析】協(xié)議擴(kuò)展需在協(xié)議定義后進(jìn)行，且必須用@objc修飾符。選項A缺少修飾符，B違反擴(kuò)展順序，D語法錯誤。協(xié)議擴(kuò)展用于實現(xiàn)協(xié)議時需要Objective-C兼容的場景?！绢}干2】以下哪項是循環(huán)引用的典型場景？【選項】A.強引用屬性持有閉包捕獲的弱引用對象B.結(jié)構(gòu)體嵌套強引用結(jié)構(gòu)體C.類屬性指向自身實例D.KVO觀察者持有被觀察者的弱引用【參考答案】C【詳細(xì)解析】C選項中類屬性持有自身實例導(dǎo)致無限循環(huán)。選項A的閉包捕獲弱引用可避免循環(huán)，B結(jié)構(gòu)體不可變無法形成循環(huán)，D使用weak引用安全?！绢}干3】SwiftUI中如何實現(xiàn)動態(tài)布局？【選項】A.使用Stack嵌套GridB.通過FlexWrap屬性C.使用Grid的columnSpacingD.使用List的contentHeight【參考答案】A【詳細(xì)解析】Stack和Grid是SwiftUI的核心布局組件。選項A通過嵌套實現(xiàn)多列布局，選項B是Grid的屬性，選項C是間距控制，選項D與動態(tài)布局無關(guān)。【題干4】CoreData中NSManagedObjectContext的持久化機(jī)制？【選項】A.自動保存B.手動調(diào)用save()C.數(shù)據(jù)遷移時自動保存D.背景線程自動保存【參考答案】B【詳細(xì)解析】CoreData需手動調(diào)用save()方法將內(nèi)存數(shù)據(jù)寫入磁盤。選項A僅在數(shù)據(jù)變更時觸發(fā)，選項C屬于數(shù)據(jù)模型變更場景，選項D不適用。【題干5】OC的Runtime實現(xiàn)協(xié)議擴(kuò)展的關(guān)鍵修飾符？【選項】Abridging【參考答案】B【詳細(xì)解析】Objective-C的協(xié)議擴(kuò)展需用@objc修飾符。選項A是橋接符號，選項C是Swift的協(xié)議擴(kuò)展修飾符，選項D不存在?！绢}干6】URLSession請求返回的URLResponse類型？【選項】A.NSURLResponseB.URLResponseC.NSHTTPURLResponseD.URLSessionResponse【參考答案】B【詳細(xì)解析】URLSession返回URLResponse抽象類型，具體類型由協(xié)議決定。選項A是NSURLResponse的舊稱，選項C是HTTP響應(yīng)子類，選項D不存在?！绢}干7】Swift中結(jié)構(gòu)體默認(rèn)的內(nèi)存管理方式？【選項】A.自動釋放池B.引用計數(shù)C.弱引用D.無GC【參考答案】D【詳細(xì)解析】Swift結(jié)構(gòu)體不可變且無引用計數(shù)，由編譯器直接分配內(nèi)存。選項A是OC機(jī)制，選項B是OC類機(jī)制，選項C用于可選類型?！绢}干8】KVO實現(xiàn)的關(guān)鍵方法？【選項】A.observeValue(forKeyPath:)B.willChangeValue(forKey:)C.didReceiveMemoryWarningDidReceiveMemoryWarningD.didReceiveMemoryWarning【參考答案】A【詳細(xì)解析】KVO通過observeValue(forKeyPath:)方法實現(xiàn)觀察。選項B是KVO的生命周期通知，選項C是內(nèi)存警告，選項D是釋放通知?！绢}干9】Objective-C的weak和unowned區(qū)別？【選項】A.weak可循環(huán)引用B.unowned必須初始化C.weak比unowned安全D.unowned自動釋放【參考答案】C【詳細(xì)解析】weak允許循環(huán)引用但需謹(jǐn)慎使用，unowned在對象釋放后安全訪問。選項A錯誤，選項B不成立，選項D是OC自動釋放池機(jī)制?！绢}干10】SwiftUI中的@State屬性作用？【選項】A.跟蹤UI狀態(tài)變化B.實現(xiàn)響應(yīng)式數(shù)據(jù)流C.管理可變存儲C.創(chuàng)建閉包回調(diào)【參考答案】A【詳細(xì)解析】@State在SwiftUI中聲明可變存儲，并觸發(fā)UI重新渲染。選項B是@Binding用途，選項C是@Var，選項D是@StateObject?！绢}干11】OC對象銷毀的條件？【選項】A.引用計數(shù)歸零B.釋放方法調(diào)用C.對象被引用計數(shù)歸零D.對象被銷毀后釋放【參考答案】A【詳細(xì)解析】OC對象通過引用計數(shù)管理，歸零時自動釋放。選項B是主動釋放，選項C是OC機(jī)制，選項D描述不完整?！绢}干12】SwiftUI的Grid布局列數(shù)控制？【選項】A.columns(4)B.columnCount(4)C.gridColumns(4)D.gridColumn(4)【參考答案】A【詳細(xì)解析】SwiftUIGrid使用columns(4)定義列數(shù)。選項B是OC的columnCount，選項C是UIGrid布局屬性，選項D是SwiftUI的column?！绢}干13】CoreData實體遷移時需修改？【選項】A.屬性類型B.關(guān)聯(lián)關(guān)系C.NSManagedObjectModelD.數(shù)據(jù)模型文件【參考答案】C【詳細(xì)解析】CoreData遷移需修改NSManagedObjectModel。選項A屬于屬性變更，選項B需更新關(guān)聯(lián)，選項D是.xcdatamodel文件?！绢}干14】URLSession數(shù)據(jù)任務(wù)返回的數(shù)據(jù)類型？【選項】A.DataB.URLResponseC.URLSessionTaskDescriptionD.請求頭【參考答案】A【詳細(xì)解析】URLSession的數(shù)據(jù)任務(wù)返回Data。選項B是響應(yīng)對象，選項C是任務(wù)描述，選項D是HTTP頭?！绢}干15】Swift中可選類型的解包方式？【選項】A.?.unwrap()B.??0C.unwrap()D.unwrappedValue【參考答案】A【詳細(xì)解析】可選類型用?.unwrap()安全解包。選項B是默認(rèn)值替換，選項C是直接解包，選項D不存在?！绢}干16】OC的KVO實現(xiàn)中willChangeValue(forKey:)的作用？【選項】A.通知觀察者B.準(zhǔn)備修改通知C.發(fā)送修改通知D.釋放觀察者【參考答案】B【詳細(xì)解析】willChangeValue(forKey:)用于預(yù)處理修改。發(fā)送通知的是observeValue(forKeyPath:)?！绢}干17】SwiftUI的List默認(rèn)滾動行為？【選項】A.滾動到最頂部B.禁止?jié)L動C.自動適應(yīng)內(nèi)容D.滾動到可見區(qū)域【參考答案】D【詳細(xì)解析】List默認(rèn)滾動到可見內(nèi)容區(qū)域。選項A是scrollToOffset，選項B是isScrollingEnabled，選項C是contentSize?！绢}干18】OC對象引用計數(shù)歸零后？【選項】A.自動釋放B.拋出異常C.對象失效D.觸發(fā)析構(gòu)函數(shù)【參考答案】A【詳細(xì)解析】OC對象引用計數(shù)歸零由運行時自動釋放。選項B是NSException，選項C是對象不再有效，選項D是C++機(jī)制?！绢}干19】URLSession配置請求頭的方式？【選項】A.setHTTPHeaderFieldB.addHTTPHeaderB.addHTTPHeadersC.setHTTPHeader【參考答案】C【詳細(xì)解析】URLSession使用URLSessionConfiguration的setHTTPHeader()方法。選項A是OCAPI，選項B是OC方法，選項D不存在?！绢}干20】SwiftUI中@EnvironmentObject的作用？【選項】A.共享全局狀態(tài)B.管理UI組件C.創(chuàng)建響應(yīng)式數(shù)據(jù)C.傳遞上下文【參考答案】A【詳細(xì)解析】@EnvironmentObject允許共享全局狀態(tài)對象。選項B是@State或@Binding，選項C是@StateObject，選項D是@Environment。2025年知識競賽-iOS面試知識競賽歷年參考題庫含答案解析(篇2)【題干1】Swift中閉包捕獲weak引用時，若捕獲的引用對象提前釋放，是否會導(dǎo)致閉包引用循環(huán)？【選項】A.是，閉包會持有弱引用導(dǎo)致對象無法釋放B.否，weak引用不會持有強引用C.是，閉包會持有強引用導(dǎo)致內(nèi)存泄漏D.否，閉包無法捕獲對象生命周期【參考答案】B【詳細(xì)解析】Swift閉包捕獲weak引用時，weak引用不會持有被捕獲對象的強引用。即使被捕獲對象提前釋放，weak引用會自動置為nil，不會觸發(fā)閉包持有強引用。選項A錯誤，因weak本身不會持有強引用；選項C錯誤，因閉包捕獲的是weak而非strong；選項D錯誤，閉包可以捕獲對象?！绢}干2】iOS中實現(xiàn)觀察者模式（KVO）最常用的兩種實現(xiàn)方式是什么？【選項】A.通知中心+委托B.屬性觀察器+數(shù)據(jù)綁定C.委托模式+觀察者協(xié)議D.內(nèi)存管理+循環(huán)檢測【參考答案】A【詳細(xì)解析】KVO的兩種主要實現(xiàn)方式是使用通知中心（NSNotificationCenter）配合委托協(xié)議（observeValueForKeyPath:ofObject:forKeyPathChange:）或使用屬性觀察器（NSPropertyChangeNotifications通知）。選項B中的數(shù)據(jù)綁定屬于MVVM模式，選項C的委托模式不直接對應(yīng)KVO，選項D與KVO無關(guān)?！绢}干3】在iOS線程模型中，以下哪種調(diào)度器負(fù)責(zé)處理UI相關(guān)的異步任務(wù)？【選項】A.主隊列（MainQueue）B.全局隊列（GlobalQueue）C.音頻隊列（AudioQueue）D.腳本隊列（ScriptQueue）【參考答案】A【詳細(xì)解析】主隊列（MainQueue）是唯一允許執(zhí)行UI操作和同步代碼的調(diào)度器，所有界面更新必須在此隊列執(zhí)行。全局隊列（GlobalQueue）用于后臺任務(wù)，音頻隊列（AudioQueue）用于音頻處理，腳本隊列（ScriptQueue）用于運行腳本?！绢}干4】Objective-C中實現(xiàn)arc（自動引用計數(shù)）后，對象釋放的條件是？【選項】A.當(dāng)對象弱引用數(shù)為0B.當(dāng)對象的所有強引用數(shù)為0C.當(dāng)對象的所有引用計數(shù)（包括weak/unowned）為0D.當(dāng)對象被銷毀或釋放【參考答案】B【詳細(xì)解析】arc通過引用計數(shù)自動管理對象的生命周期，當(dāng)對象的所有強引用（strong、weak、unowned的引用屬性）計數(shù)降為0時，對象才會被釋放。weak/unowned引用不計入引用計數(shù)。選項A錯誤，weak引用不參與計數(shù)；選項C錯誤，weak/unowned不計入；選項D不準(zhǔn)確，arc不依賴顯式釋放。【題干5】iOS中實現(xiàn)多線程通信最安全的兩種方式是？【選項】A.GCD+同步隊列+鎖B.GCD+異步隊列+信號量C.GrandCentralDispatch+同步隊列+信號量D.GrandCentralDispatch+異步隊列+互斥鎖【參考答案】D【詳細(xì)解析】GCD通過異步隊列（如dispatch_queue_t）實現(xiàn)多線程通信，配合互斥鎖（dispatch_mutex_t）或信號量（dispatch_semaphore_t）實現(xiàn)線程同步。同步隊列（同步執(zhí)行）不適用于多線程，選項A錯誤；信號量（optionB）和互斥鎖（optionD）均可實現(xiàn)同步，但互斥鎖更直接用于線程互斥?！绢}干6】Swift中以下哪種語法是無效的？【選項】A.letx=[1,2,3].sorted(by:>)B.funcadd(a:Int,b:Int)->Int{returna+b}C.structPoint{varx:Int}D.iftrue{print("Hello")}【參考答案】A【詳細(xì)解析】Swift數(shù)組排序時默認(rèn)升序，降序需使用by:>，但語法正確性不依賴排序結(jié)果。選項B符合函數(shù)定義規(guī)則；選項C是合法結(jié)構(gòu)體定義；選項D是正確if語句。所有選項語法均正確，但題目存在陷阱，需注意題目要求“無效語法”?！绢}干7】iOS中實現(xiàn)單例模式最推薦的方式是？【選項】A.通過類方法全局訪問B.使用NSNotificationCenter+中心事件C.使用lazyvar+作用域限制D.使用@objcweak+委托模式【參考答案】C【詳細(xì)解析】Swift推薦使用lazyvar+作用域限制（如Appdelegate）實現(xiàn)單例。選項A存在線程安全問題；選項B與單例無關(guān)；選項D使用弱引用但未解決作用域問題?！绢}干8】Objective-C中KVO實現(xiàn)的關(guān)鍵步驟是什么？【選項】A.注冊觀察者并添加通知B.創(chuàng)建觀察者對象并設(shè)置屬性C.在屬性定義中添加@encodeD.在屬性定義中添加@optional【參考答案】A【詳細(xì)解析】KVO實現(xiàn)需在類中實現(xiàn)NSObserving協(xié)議方法（observeValueForKeyPath:ofObject:forKeyPathChange:withContext:），并通過通知中心注冊觀察者。選項B是創(chuàng)建觀察者的基礎(chǔ)，但未涉及核心實現(xiàn)；選項C是屬性編碼聲明，與KVO無關(guān)；選項D是可選協(xié)議聲明，非KVO實現(xiàn)條件?！绢}干9】iOS中實現(xiàn)數(shù)據(jù)持久化最常用的兩種方式是？【選項】A.XML解析+JSON序列化B.SQLite+CoreDataC.PropertyList+KeychainD.NSCoding+NSKeyedArchiver【參考答案】B【詳細(xì)解析】數(shù)據(jù)持久化常用方案包括CoreData（對象graphs管理）和SQLite（通過FMDB庫）。選項A是數(shù)據(jù)格式處理方式，非持久化方案；選項C的Keychain用于安全存儲密鑰；選項D是歸檔機(jī)制，屬于序列化方式?！绢}干10】iOS中實現(xiàn)線程安全的字典操作需要滿足什么條件？【選項】A.使用弱引用訪問B.在主隊列上同步訪問C.使用鎖保護(hù)訪問D.添加@NSCopying協(xié)議【參考答案】C【詳細(xì)解析】線程安全訪問字典需通過鎖（鎖對象或同步代碼塊）。選項A與線程安全無關(guān)；選項B僅適用于UI線程，無法解決多線程競爭；選項D要求字典元素遵守NSCopying協(xié)議，但非線程安全條件。【題干11】Swift中以下哪種語法是無效的？【選項】A.functest(){letx=1;returnx}B.ifletx=Int("123"){print(x)}C.structA{varx:Int}D.varx:Int{didSet{print(x)}}【參考答案】A【詳細(xì)解析】Swift函數(shù)必須返回值，選項A缺少return語句導(dǎo)致編譯錯誤。選項B使用可選綁定，選項C是結(jié)構(gòu)體定義，選項D是計算屬性聲明?！绢}干12】iOS中實現(xiàn)多線程間通信最常用的同步原語是？【選項】A.互斥鎖（mutex）B.信號量（semaphore）C.通知中心（NotificationCenter）D.共享內(nèi)存（共享緩沖區(qū)）【參考答案】A【詳細(xì)解析】互斥鎖（dispatch_mutex_t）用于線程間同步訪問共享資源，信號量（dispatch_semaphore_t）用于控制并發(fā)數(shù)量，通知中心用于發(fā)布訂閱模式。共享內(nèi)存（如GrandCentralDispatch的共享緩沖區(qū)）屬于更底層的機(jī)制。【題干13】Objective-C中實現(xiàn)循環(huán)檢測最有效的方式是？【選項】A.使用weak引用B.使用unowned引用C.使用__weak關(guān)鍵字D.使用__strong關(guān)鍵字【參考答案】A【詳細(xì)解析】weak引用會自動置為nil，避免循環(huán)引用。選項B的unowned引用在對象釋放后直接變?yōu)閚il，可能引發(fā)空指針異常，但能防止循環(huán)引用。選項C和D是C++特性，Objective-C中不適用?！绢}干14】iOS中實現(xiàn)異步任務(wù)調(diào)度最常用的框架是？【選項】A.OperationQueueB.GCDC.CoreDataD.multithreaded【參考答案】B【詳細(xì)解析】GrandCentralDispatch（GCD）是iOS原生多線程框架，通過隊列管理異步任務(wù)。OperationQueue是Objective-C的線程管理框架，CoreData用于數(shù)據(jù)持久化，multithreaded是C++特性?！绢}干15】Swift中以下哪種語法是無效的？【選項】A.funcadd(a:Int,b:Int)->Int{returna+b}B.letx=[1,2,3].sorted()C.structPoint{varx:Int}D.iftrue{print("Hello")}【參考答案】B【詳細(xì)解析】Swift數(shù)組默認(rèn)排序升序，若需降序需使用sorted(by:>)，但選項B語法正確，只是排序結(jié)果不符合預(yù)期。所有選項語法均正確，但題目存在陷阱，需注意題目要求“無效語法”?！绢}干16】iOS中實現(xiàn)弱引用最安全的場景是？【選項】A.捕獲閉包中的循環(huán)引用B.訪問全局變量C.訪問局部變量D.訪問靜態(tài)變量【參考答案】A【詳細(xì)解析】weak引用主要用于解決閉包捕獲導(dǎo)致的循環(huán)引用問題。全局變量、局部變量和靜態(tài)變量的生命周期由系統(tǒng)管理，無需使用weak引用?！绢}干17】Objective-C中實現(xiàn)KVO后，若屬性值未發(fā)生變化，觀察者是否會被通知？【選項】A.被通知B.不被通知C.被通知但無影響D.觸發(fā)錯誤【參考答案】B【詳細(xì)解析】KVO觀察者僅在屬性值實際變化（keyPathChange為true）時被通知。若屬性未變化，keyPathChange默認(rèn)為false，觀察者不會收到通知。【題干18】iOS中實現(xiàn)線程池管理最常用的API是？【選項】A.NSOperationQueueB.dispatch_queue_tC.OperationQueueD.thread池【參考答案】B【詳細(xì)解析】GrandCentralDispatch通過dispatch_queue_t定義線程池，如主隊列、全局隊列等。NSOperationQueue是Objective-C的線程管理框架，OperationQueue是C++特性，thread池是通用術(shù)語?！绢}干19】Swift中以下哪種語法是無效的？【選項】A.functest(){letx=1;returnx}B.ifletx=Int("123"){print(x)}C.structA{varx:Int}D.varx:Int{didSet{print(x)}}【參考答案】A【詳細(xì)解析】Swift函數(shù)必須返回值，選項A缺少return語句導(dǎo)致編譯錯誤。其他選項語法均正確。【題干20】iOS中實現(xiàn)數(shù)據(jù)緩存最推薦的兩種策略是？【選項】A.內(nèi)存緩存+磁盤緩存B.本地數(shù)據(jù)庫+KeychainC.內(nèi)存池+共享內(nèi)存D.壓縮緩存+分片緩存【參考答案】A【詳細(xì)解析】數(shù)據(jù)緩存常用策略包括內(nèi)存緩存（緩存最近訪問數(shù)據(jù)）和磁盤緩存（持久化存儲）。選項B的Keychain用于安全存儲，選項C的內(nèi)存池用于對象復(fù)用，選項D是緩存優(yōu)化技術(shù)，非基礎(chǔ)策略。2025年知識競賽-iOS面試知識競賽歷年參考題庫含答案解析(篇3)【題干1】Swift中閉包捕獲的@autoreleasing修飾符與@strong修飾符的主要區(qū)別是什么？【選項】A.前者自動釋放引用計數(shù)為0的對象，后者不會B.前者捕獲強引用，后者捕獲弱引用C.前者適用于循環(huán)引用場景，后者不適用D.前者在ARC中自動釋放，后者需要手動釋放【參考答案】A【詳細(xì)解析】@autoreleasing修飾符會自動創(chuàng)建一個weak引用以防止循環(huán)引用，當(dāng)閉包實例的引用計數(shù)為0時自動釋放對象。而@strong修飾符會捕獲強引用，可能導(dǎo)致循環(huán)引用。選項A正確描述了兩者的核心區(qū)別?！绢}干2】Objective-C對象釋放時，如果retains計數(shù)器減至0，會發(fā)生什么？【選項】A.立即調(diào)用deinit方法B.觸發(fā)__attribute__((weak))聲明的弱引用更新C.自動調(diào)用ARC的釋放機(jī)制D.觸發(fā)KVO觀察者的didReceiveMemoryWarning事件【參考答案】C【詳細(xì)解析】Objective-C的retains計數(shù)器由ARC管理，當(dāng)計數(shù)器減至0時，ARC會自動調(diào)用對象的自定義銷毀方法（ifneeded）并執(zhí)行內(nèi)存回收。選項C正確。其他選項與內(nèi)存釋放機(jī)制無關(guān)?！绢}干3】iOS中實現(xiàn)關(guān)鍵路徑優(yōu)先級的方式是？【選項】A.使用線程池的優(yōu)先級參數(shù)B.在代碼中插入__attribute__((nominate))修飾符C.聲明線程為QOS優(yōu)先級D.調(diào)用dispatch_queue_setAssociatedValue方法【參考答案】C【詳細(xì)解析】iOS開發(fā)中，通過聲明線程為`QoS`優(yōu)先級（如`dispatch_queue_attrletios:DISPATCH_QUEUE_attrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrletios:DISPATCH_QOSattrlet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