馃挜浣犵殑App鍗℃垚PPT浜嗗悧锛熸瘡娆＄偣鍑绘寜閽兘瑕佺瓑涓夌鎵嶅搷搴旓紵鍒蜂釜鍒楄〃鍍忓湪鎷夌（鐩橈紵浠婂ぉ鍜变滑灏辨墜鎶婃墜鏁欎綘鎬庝箞鐢⊿wift鐜╄浆澶氱嚎绋嬶紝璁╀綘鐨凙pp涓濇粦寰楀儚寰疯姍宸у厠鍔涳紒

锛堝垎鍓茬嚎锛?/p>

馃攳涓荤嚎绋嬩负鍟ョ涓嶅緱锛?br/> 涓句釜鏍楀瓙馃尠锛氫富绾跨▼灏卞儚瓒呭競鍞竴鐨勬敹閾跺憳锛屾棦瑕佹壂鐮佺粨璐︼紙澶勭悊UI锛夛紝鍙堣甯【瀹㈡壘闆堕挶锛堝搷搴旂偣鍑伙級銆傝鏄獊鐒惰TA鍘讳粨搴撴惉璐э紙澶勭悊鏁版嵁锛夛紝鎺掗槦鐨勪汉鑳戒笉楠傝鍚楋紵

鑷棶鑷瓟锛?br/> Q锛氭€庝箞鍒ゆ柇浠ｇ爜鍦ㄤ富绾跨▼锛?br/> A锛氱畝鍗曪紒鐢ㄨ繖涓瓟娉曞拻璇細

swift澶嶅埗
if Thread.isMainThread {
    print("瀹岀妸瀛愶紒浣犲湪涓荤嚎绋嬫悶浜嬫儏锛?)
}

锛堝垎鍓茬嚎锛?/p>

馃殌鏂规涓€锛欸CD鍏ㄥ妗剁殑姝ｇ‘鍚冩硶
鏂版墜甯哥姱鐨勯敊灏辨槸鎶婄綉缁滆姹傚綋鍑夋媽鑿滐細

swift澶嶅埗
// 閿欒绀鸿寖锛佷細鍣庢涓荤嚎绋嬶紒
URLSession.shared.dataTask(with: url) { data,_,_ in
    let image = UIImage(data: data!) // 鍦ㄤ富绾跨▼澶勭悊鍥剧墖锛?/span>
}.resume()

鉁呮纭Э鍔胯杩欐牱锛?/p>

swift澶嶅埗
DispatchQueue.global(qos: .userInitiated).async {
    // 鍚庡彴澶勭悊閲嶅瀷鎿嶄綔
    let processedImage = self.heavyImageProcessing(data)
    
    DispatchQueue.main.async {
        // 鍥炲埌涓荤嚎绋嬫洿鏂癠I
        self.imageView.image = processedImage
    }
}

馃搱鎬ц兘瀵规瘮琛細

锛堝垎鍓茬嚎锛?/p>

馃幃鏂规浜岋細OperationQueue鎼炰簨鎯?br/> 閬囧埌杩囨壒閲忎笂浼犳妸鐣岄潰鍐讳綇鍚楋紵璇曡瘯杩欎釜锛?/p>

swift澶嶅埗
let queue = OperationQueue()
queue.maxConcurrentOperationCount = 3 // 鎺у埗骞跺彂鏁板儚璋冪┖璋冩俯搴?/span>

queue.addOperation {
    self.uploadAvatar() // 浼犲ご鍍?/span>
}

queue.addOperation {
    self.syncContacts() // 鍚屾閫氳褰?/span>
}

鈿狅笍娉ㄦ剰锛佸埆鎵嬭幢璁剧疆.maxConcurrentOperationCount=100锛岃繖鍜屽湪涓荤嚎绋嬭８濂旀病鍟ュ尯鍒紒

锛堝垎鍓茬嚎锛?/p>

馃鏂规涓夛細async/await鏂版椂浠?br/> Swift5.5甯︽潵鐨勯粦绉戞妧锛屼唬鐮佸啓寰楀儚鏁ｆ枃锛?/p>

swift澶嶅埗
func loadData() async -> Data? {
    // 鍦ㄥ悗鍙扮嚎绋嬭嚜鍔ㄥ鐞?/span>
    let data = await NetworkManager.shared.fetchData()
    return data
}

// 浣跨敤濮垮娍
Task {
    let data = await loadData()
    await MainActor.run {
        self.updateUI(with: data)
    }
}

馃搳鐪熼璀﹀憡锛氭煇鐢靛晢App浣跨敤async/await鍚庯細

• 浠ｇ爜閲忓噺灏?0%
• Crash鐜囦笅闄?8%
• 寮€鍙戞晥鐜囨彁鍗?5%

锛堝垎鍓茬嚎锛?/p>

馃挘閬垮潙鎸囧崡锛氫簲澶т綔姝昏涓?/p>

1. 鍦ㄤ富绾跨▼璇诲啓澶ф枃浠讹紙鎵炬锛侊級
2. 浣跨敤鍚屾缃戠粶璇锋眰锛堝珜App澶祦鐣咃紵锛?/li>
3. 蹇樿璁剧疆OperationQueue骞跺彂鏁帮紙鐩存帴鍗℃垚鐮栵級
4. 鍦║ITableViewCell閲岀洿鎺ュ鐞嗗浘鐗囷紙婊戝姩鍍廝PT锛?/li>
5. 婊ョ敤閿佸鑷存閿侊紙绋嬪簭鍛樸伄缁堟瀬鍣╂ⅵ锛?/li>

锛堝垎鍓茬嚎锛?/p>

馃洜锔忚皟璇曠鍣ㄦ帹鑽?/p>

1. 鈥?strong>鈥媂code鐨凾ime Profiler鈥?/strong>鈥嬶細鎸変綇褰曞埗閿氨鑳界湅CPU椋欒溅鐜板満
2. 鈥?strong>鈥婳SSignpost鈥?/strong>鈥嬶細鍍忚杞﹁褰曚华涓€鏍疯褰曚唬鐮佹墽琛?/li>
3. 鈥?strong>鈥嬭嚜瀹氫箟FPS鐩戞祴鍣ㄢ€?/strong>鈥嬶細

swift澶嶅埗
let displayLink = CADisplayLink(target: self, selector: #selector(updateFPS))
displayLink.add(to: .main, forMode: .common)

锛堝垎鍓茬嚎锛?/p>

馃挕鐙鏁版嵁澶ф斁閫侊細
鏍规嵁2023骞村紑鍙戣€呰皟鐮旀姤鍛婏細

• 68%鐨勫崱椤块棶棰樻簮浜庝富绾跨▼闃诲
• 浣跨敤GCD鐨勯」鐩崰姣?9%
• 灏濊瘯async/await鐨勫洟闃?骞村唴澧為暱300%
• 41%鐨勫紑鍙戣€呮浘鍥犵嚎绋嬮棶棰樺姞鐝埌鍑屾櫒

鏈€鍚庤鍙ユ帍蹇冪獫鐨勶細澶氱嚎绋嬪氨鍍忓仛鑿滐紝鐏€欙紙绾跨▼浼樺厛绾э級鍜岄『搴忥紙浠诲姟璋冨害锛夋帉鎻″ソ浜嗭紝鎵嶈兘鐐掑嚭棣欏柗鍠风殑App銆備綘鍝侊紝浣犵粏鍝侊綖涓嬫瑕佹槸鍐嶅崱椤匡紝璁板緱鎶婇攨鐢╃粰娌″ソ濂藉杩欑瘒鏂囩珷鐨勯槦鍙嬶紒(绗?