馃挜 "鏄ㄥぉ杩樺ソ濂界殑锛屾€庝箞涓€鏀逛唬鐮佸氨闂€€锛? 杩欐槸鏂版墜缇ら噷鏈€杩戞渶鎵庡績鐨勫搥鍤庛€傝€佸徃鏈虹敤鐫€娌′簨鐨勬柟娉曪紝鍒颁綘鎵嬩笂鎬庝箞灏卞穿浜嗗憿锛熶粖澶╁挶浠敤5涓湡瀹炵炕杞︾幇鍦猴紝鎵嬫妸鎵嬫暀浣犳偓宕栧嫆椹紒

馃毀 鍦烘櫙涓€锛氱敓鍛藉懆鏈熸柟娉曞繕璁皊uper璋冪敤锛?0%鏂版墜鏍借繃锛?/h3>

鈥?strong>鈥嬪穿婧冪幇璞♀€?/strong>鈥嬶細
椤甸潰榛戝睆/鎸夐挳鐐瑰嚮鏃犲弽搴?/p>

swift澶嶅埗
// 閿欒绀鸿寖
override func viewWillAppear(_ animated: Bool) {
    print("椤甸潰瑕佹樉绀轰簡锛?)
    // 婕忎簡super.viewWillAppear(animated)
}

鈥?strong>鈥嬪師鐞嗘彮绉樷€?/strong>鈥嬶細
UIViewController鐨勭敓鍛藉懆鏈熷氨鍍忓绫宠楠ㄧ墝锛屾紡鎺塻uper璋冪敤绛変簬鎵撴柇杩為攣鍙嶅簲銆俋code涓嶄細鎶ラ敊锛屼絾绯荤粺绾ф搷浣滐紙濡傝浆鍦哄姩鐢伙級鐩存帴缃㈠伐锛?/p>

鈥?strong>鈥嬫晳鍛芥柟妗堚€?/strong>鈥嬶細

1. 鐢ㄤ唬鐮佺墖娈典繚瀛樻ā鏉?/li>

swift澶嶅埗
override func viewWillAppear(_ animated: Bool) {
    super.viewWillAppear(animated) // 蹇呴』淇濈暀锛?/span>
    // 浣犵殑浠ｇ爜
}

1. 瀹夎SwiftLint鎻掍欢鑷姩妫€娴?/li>

---

馃敟 鍦烘櫙浜岋細鍒濆鍖栨柟娉曞弬鏁颁贡鏀癸紙缂栬瘧閮借繃涓嶄簡锛?/h3>

鈥?strong>鈥嬫浜℃渚嬧€?/strong>鈥嬶細
涓婂懆缇ゅ弸灏忔槑鎯宠嚜瀹氫箟UIView鍒濆鍖栵紝缁撴灉...

swift澶嶅埗
// 鐖剁被澹版槑
init(frame: CGRect, themeColor: UIColor)

// 浣滄鍐欐硶
override init(frame: CGRect) { // 鉂?鍙傛暟鏁伴噺涓嶅
    super.init(frame: frame)
}

鈥?strong>鈥嬬郴缁熸毚鎬掆€?/strong>鈥嬶細
'Super.init' isn't called on all paths before returning from initializer

鈥?strong>鈥嬬牬瑙ｄ箣閬撯€?/strong>鈥嬶細
鈻?鎸変綇Command鐐规柟娉曞悕鐪嬬埗绫诲０鏄?br/> 鈻?浣跨敤Xcode鑷姩琛ュ叏锛堣緭鍏verride鍚庢寜鍥炶溅锛?/p>

---

馃尓 鍦烘櫙涓夛細鎵嬭幢閲嶅啓绉佹湁鏂规硶锛堣繍琛屾椂宕╂簝锛?/h3>

鈥?strong>鈥嬬伒寮傜幇鍦衡€?/strong>鈥嬶細
"鎴戝氨鎯虫敼涓寜閽鑹诧紝鎬庝箞鍚姩灏卞穿锛?

swift澶嶅埗
// 閿欒灏濊瘯閲嶅啓绉佹湁鏂规硶
override func _updateButtonStyle() { // 鉂?甯︿笅鍒掔嚎鐨勬柟娉曞緢鍗遍櫓锛?/span>
    // 浣犵殑榄旀敼浠ｇ爜
}

鈥?strong>鈥嬪嵄闄╀俊鍙封€?/strong>鈥嬶細
鈻讹笍 宕╂簝淇℃伅鍚?NSInvalidArgumentException"
鈻讹笍 鎺у埗鍙版彁绀簎nrecognized selector sent to instance

鈥?strong>鈥嬩繚鍛芥妧宸р€?/strong>鈥嬶細

1. 鐢╮espondsToSelector妫€鏌ユ柟娉曟槸鍚﹀瓨鍦?/li>
2. 瀹樻柟鏂囨。娌″啓鐨勬柟娉曞埆纰?/li>
3. 浣跨敤Method Swizzling瑕佷笁鎬?/li>

---

馃挘 鍦烘櫙鍥涳細绾跨▼闂寮曞彂UI閿欎贡锛堟渶闅炬煡鐨勫潙锛?/h3>

鈥?strong>鈥嬬湡瀹炶妗堚€?/strong>鈥嬶細
鏌愮數鍟咥pp鍟嗗搧椤电獊鐒剁櫧灞忥紝绔熸槸閲嶅啓layoutSubviews鏃?..

swift澶嶅埗
override func layoutSubviews() {
    DispatchQueue.global().async { // 鉂?鍦ㄥ悗鍙扮嚎绋嬫搷浣淯I
        self.button.frame = CGRect(x: 0, y: 0, width: 100, height: 40)
    }
}

鈥?strong>鈥嬪穿婧冭寰嬧€?/strong>鈥嬶細
鈻讹笍 10娆¤繍琛?娆℃甯革紝7娆″穿婧?br/> 鈻讹笍 鎶ラ敊鍚?Main Thread Checker"

鈥?strong>鈥嬬嚎绋嬪畨鍏ㄦ墜鍐屸€?/strong>鈥嬶細

swift澶嶅埗
override func layoutSubviews() {
    super.layoutSubviews()
    DispatchQueue.main.async { // 鉁?涓荤嚎绋嬫姢浣?/span>
        // UI鎿嶄綔鏀捐繖閲?/span>
    }
}

---

馃毃 鍦烘櫙浜旓細璁块棶鏉冮檺瓒婃敼瓒婂皬锛堢紪璇戞湡鍩嬮浄锛?/h3>

鈥?strong>鈥嬫潈闄愮伨闅锯€?/strong>鈥嬶細
鎯抽檺鍒跺閮ㄨ闂紝缁撴灉...

swift澶嶅埗
// 鐖剁被澹版槑
open func calculateSize() -> CGSize

// 浣滄閲嶅啓
override private func calculateSize() -> CGSize { // 鉂?璁块棶鏉冮檺浠巓pen闄嶇骇
    return CGSize(width: 100, height: 100)
}

鈥?strong>鈥嬬紪璇戝櫒鎬掑惣鈥?/strong>鈥嬶細
Cannot override a non-open declaration with an open one

鈥?strong>鈥嬫潈闄愬鐓ц〃鈥?/strong>鈥嬶細

鐖剁被鏉冮檺	鍚堟硶瀛愮被鏉冮檺
open	open, public
public	public, internal
internal	internal, fileprivate

---

馃洜 缁堟瀬璋冭瘯宸ュ叿绠憋紙3骞磋俯鍧戠粡楠岋級

閬囧埌宕╂簝鍒厡锛屾寜杩欎釜娴佺▼鎺掓煡锛?br/> 1锔忊儯 鐪嬪穿婧冨爢鏍堢涓€涓嚜瀹朵唬鐮侊紙閲嶇偣妫€鏌verride鏂规硶锛?br/> 2锔忊儯 妫€鏌ユ帶鍒跺彴鏄惁鏈?override"鐩稿叧璀﹀憡
3锔忊儯 瀵规瘮鐖剁被鏂规硶澹版槑锛堝弬鏁般€佽繑鍥炲€笺€佽闂潈闄愶級
4锔忊儯 娉ㄩ噴娉曪細閫愪釜娉ㄩ噴鏂板浠ｇ爜瀹氫綅闂鐐?/p>

鈥?strong>鈥嬪喎鐭ヨ瘑鈥?/strong>鈥嬶細Swift缂栬瘧鍣ㄥoverride鐨勬鏌ユ瘮Objective-C涓ユ牸3鍊嶏紒杩欐槸濂戒簨涔熸槸鍧忎簨锛屼綘缁嗗搧...

鏈€鍚庤涓墡蹇冪湡鐩革細缇ら噷缁熻鏄剧ず锛屸€?strong>鈥?8%鐨刼verride鐩稿叧宕╂簝鍏跺疄閮借兘琚玐code鎻愬墠棰勮鈥?/strong>鈥嬶紝鍙槸寰堝浜哄拷鐣ヤ簡榛勮壊璀﹀憡鈿狅笍銆傚吇鎴愭瘡澶╂竻鐞嗚鍛婄殑濂戒範鎯紝鑳借浣犲皯鍔?灏忔椂鐝紒