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Runtime运用:埋点统计

对应的返回上一个界面的方式是pop和dismiss，一般在pop或者dismiss方法调用之后，随后就会调用dealloc方法，将UIViewController内存情况，内存得到释放，如果无法调用dealloc...), @selector(ht_ViewDidLoad)); monitor_exchangeInstanceMethod([self class], @selector(viewWillAppear...:), @selector(ht_viewWillAppear:)); monitor_exchangeInstanceMethod([self class], @selector(viewDidAppear...和viewdidappear方法替换成了自定义的ht_ViewDidLoad以及ht_viewDidAppear。...viewWillDisappear方法中，我们可以通过判断self.isMovingFromParentViewController || self.isBeingDismissed来得知是否是被Pop或者dismiss

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关于循环引用问题

原理：MLeaksFinder是从UIViewController入手的，UIViewController在POP或dismiss之后该控制器及其上的view，view的subviews都会被释放掉，MleaksFinder...就是在控制器POP或dismiss之后去查看该控制器和其上的view是否都被释放掉。...和viewDidDisAppear 和新方法的交换,并在viewWillAppear方法绑定一个标志，NO则表示Push,YES则表示Pop，当标志为YES时，则实现延迟方法。...:) withSEL:@selector(dt_viewWillAppear:)]; [self swizzleSEL:@selector(viewDidDisappear:) withSEL...:@selector(dt_viewDidDisAppear:)]; }); } -(void)dt_viewWillAppear:(BOOL)animate{ [self dt_viewWillAppear

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初探 Core ML：学习建立一个图像识别 App

override func viewDidLoad() { super.viewDidLoad() } override func didReceiveMemoryWarning...override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading...回到 ViewController.swift，将 CoreML 引入： import CoreML 接着，为 Inceptionv3 宣告一个 model 变数并且在 viewWillAppear()...override func viewWillAppear(_ animated: Bool) { model = Inceptionv3() } 我知道你现在在想什么。...「在 viewWillAppear 中定义的要点是什么?」这要点是当你的 App 试着识别你的图像里有哪些物件时，会快上许多。

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Swift 学习Using Swift mix and match, network: 写rss读者

_screenHeight = UIScreen.mainScreen().bounds.size.height } override func viewWillAppear(...animated: Bool) { super.viewWillAppear(animated) // config navigations let dict...brief Here FeedManager is a singleton, use to manage feed data objects // @author huangyibiao // // never...: Bool) { super.viewWillAppear(animated) _tableView!....() { super.viewDidLoad() self.title = _feedModel!.

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Combine-常见使用场景

@Published var text = "" private var cancellables = Set() override func viewDidLoad...() { super.viewDidLoad() $text .debounce(for: 0.5, scheduler: DispatchQueue.main...UIViewController let nextViewController = NextViewController() let publisher = PassthroughSubjectNever...nextViewController, animated: true) // 传递值的UIViewController var publisher: PassthroughSubjectNever...send("传值") dismiss(animated: true) { self.publisher?.send(completion: .finished) } }

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iOS14开发-UIViewController

（初始化、分配内存）—> loadView（加载view）—> viewDidLoad（view已经加载）—> viewWillAppear（view即将显示）—> viewWillLayoutSubviews...loadView 方法执行完会自动执行 viewDidLoad。...返回界面：dismiss。 iOS 13 之后，模态跳转并非全屏显示，如果需要全屏显示，需要手动设置。两个概念 presentedViewController: 被 present 的控制器。...基本使用 class ViewController: UIViewController { override func viewDidLoad() { super.viewDidLoad...= .never 右侧按钮如果当前 UIViewController 设置了rightBarButtonItem属性，则显示右侧按钮，否则显示空白。

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iOS对UIViewController生命周期和属性方法的解析

; //内存警告 - (void)didReceiveMemoryWarning; //已经展示 -(void)viewDidAppear:(BOOL)animated; //将要展示 -(void)viewWillAppear...4：viewDidLoad方法是我们最常用的方法的，类中成员对象和变量的初始化我们都会放在这个方法中，在类创建后，无论视图的展现或消失，这个方法也是只会在将要布局时调用一次。...5：viewWillAppear：视图将要展现时会调用。 6：viewWillLayoutSubviews：在viewWillAppear后调用，将要对子视图进行布局。...可以看到，手动调用loadView后，label是被创建了出来，但是暴漏了一个更严重的问题，系统不在调用ViewDidLoad方法，这是十分有风险的，因为我们大部分的初始化代码都会放在这个方法里，所以手动调用...segue在StoryBoard中除了用来自动正向跳转外，我们还可以进行反向的跳转，类似pop和dismiss方法，这种segue被称为unwind sugue。

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iOS - 聊聊 autorelease 和 @autoreleasepool

pop(coldPage()->begin()); } else { // Pool was never used....接着我们来看 “系统干预释放” 情况的示例： - (void)viewDidLoad { [super viewDidLoad]; HTPerson *person = [[[HTPerson...，调用了autorelease方法的person对象不是在viewDidLoad方法结束后释放，而是在viewWillAppear方法结束后释放，说明在viewWillAppear方法结束的时候，调用了...以上person对象在viewWillAppear方法结束后释放，说明viewDidLoad和viewWillAppear方法在同一次循环里。...- (void)viewDidLoad { [super viewDidLoad]; @autoreleasepool { HTPerson *person =

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【GitLab CICD】：条件、分支（rules）

If a rule matches, and has when: never as the attribute....“If this rule evaluates to true, do not add the job” (by adding when: never)....matches, and is always used if reached....示例1：根据 commit meesage 触发 publish-modern-docs: stage: build trigger: include: sef/sef_docs_modern...示例2：根据 Tag 触发 build_sef: stage: build trigger: include: sef/.gitlab-ci_sef.yml rules: -

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复制的官方GitLab 文档

To run a pipeline, set to always. To prevent pipelines from running, set to never....Alternatively, all of the rules can be when: never, with a final when: always rule....- if: '$CI_PIPELINE_SOURCE == "push"' when: never - when: always This example prevents...rules: - if: '$CUSTOM_VARIABLE == "false"' when: never - when: always This job does not...rules: - if: '$CI_PIPELINE_SOURCE == "push"' when: never - when: always You should not

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fio基础3

file into command line options --eta=when When ETA estimate should be printed May be "always...", "never" or "auto" --eta-newline=time Force a new line for every 'time' period passed --status-interval...work calibration only (option=calibrate) --inflate-log=log Inflate and output compressed log --trigger-file...=file Execute trigger cmd when file exists --trigger-timeout=t Execute trigger af this time --trigger...=cmd Set this command as local trigger --trigger-remote=cmd Set this command as remote trigger -

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iOS12、iOS11、iOS10、iOS9常见适配

viewSafeAreaInsetsDidChange的调用时机如下： [ ] 1、viewDidLoad [ ] 2、viewWillAppear [x] 3、viewSafeAreaInsetsDidChange...因此在viewDidload中根据SafeArea设置界面会有问题。...{ [super viewDidLoad]; } - (void)testSafeArea { UIEdgeInsets safeAreaInsets = sgm_safeAreaInset...、定位相关在 iOS 11 中必须支持 When In Use 授权模式（NSLocationWhenInUseUsageDescription），在 iOS 11 中，为了避免开发者只提供请求 Always...授权模式这种情况，加入此限制，如果不提供When In Use 授权模式，那么 Always 相关授权模式也无法正常使用。

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SpringBoot项目集成QuartzJob任务

characterEncoding=UTF-8&useSSL=false&serverTimezone=Asia/Shanghai 待第一次运行后可以再根据自己的需要修改 2、配置文件中的 initialize-schema: always...配置的 always 属性意思是，每次初始化都会重新生成表(执行一次删除，执行一次创建)，生成后，可以修改为 never 只有以上两个条件同时配置满足，才能使quartz 在第一次运行时，自动生成所需的表...配置文件中的 initialize-schema: always 配置的 always 属性意思是，每次初始化都会重新生成表(执行一次删除，执行一次创建)，生成后，可以修改为 never spring.quartz.jdbc.initialize-schema...=never # 时任务启动开关，true-开 false-关 spring.quartz.auto-startup=true #??...和 jobDetail 加入这个调度 scheduler.scheduleJob(jobDetail, trigger); // 启动scheduler

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【Hooks】：Awesome React Hooks

Hooks let you always use functions instead of having to constantly switch between functions, classes,...Moreover, passing an empty array will tell React to call it once and never again....By doing so we tell it be called once on mounting then never again....Think of useRef as a useState that does not trigger a re-rendering of our component....Always call the effect. This is one of the two rules of hooks.

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CPU Idle Time Management

is possible to stop the scheduler tick entirely on idle CPUs in principle, even though that may not always...the CPU will start to execute the first new instruction (assuming that both cores in the module will always...still the physical properties of the idle state that the processor hardware finally goes into must always...They should never select any idle states with exit latency beyond that limit....In that case, they will never ask for any of those idle states or expose them to the governor.

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golang:各种异步等待集合

break that test.var ForeverTestTimeout = time.Second * 30// NeverStop may be passed to Until to make it never...priority selection in golang // it is possible for this to race, meaning we could // trigger...If zero, initial // duration is always used....Steps int // The returned duration will never be greater than cap *before* jitte // is applied....amount of each duration is added// (between duration and duration*(1+jitter)).//// If the condition never

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Three bugs in the Go MySQL Driver

connections when they've lived that long, even if the connections are being actively used and could not trigger...has happened inside the rows.Scan call (for example, where it needs to happen for this data race to trigger...it's probably been quite a few because, despite the subtlety in its origin, it’s surprisingly easy to trigger...Calling (*Rows).Close several times is always safe....Never use (*Rows).Scan with a sql.RawBytes target.

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【TypeScript】：functions、types

S : never; type ReducerAction> = R extends Reducer ?...A : never; // The identity check is done with the SameValue algorithm (Object.is), which is stricter...S : never; /** * An alternative to `useState`....It also lets you optimize performance for components that trigger deep * updates because you can pass...defer, is determined by whether or not the type system has enough information to conclude that T is always

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SpringBoot 集成 Quartz，一文搞定任务调度

Trigger Trigger是一个触发器,定义Job执行的时间规则。...false #配置的job是否覆盖已经存在的JOB信息 overwrite-existing-jobs: false jdbc: initialize-schema: ALWAYS...操作方法：修改:spring.quartz.jdbc.initialize-schema: ALWAYS、说明一下这里有3个值可选：ALWAYS（每次都生成）、EMBEDDED（仅初始化嵌入式数据源...）、NEVER（不初始化数据源）。...表生成之后，再改为never即可。注意一点就是我测试了下，发现只有使用druid数据库连接池才会自动生成表 3、表的说明会自动生成的表如下： //以Blob 类型存储的触发器。

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AVKit框架详细解析（二） —— 基于视频播放器的画中画实现（一）

RickTV 有各种各样的内容，但出于某种原因，无论您选择什么视频，都只会播放 Rick Astley 的 Never Gonna Give You Up。该死的那些互联网巨魔。行。...在 viewDidLoad()中，在 view.layer.addSublayer(playerLayer)下，添加以下代码： pictureInPictureController = AVPictureInPictureController...首先，在pictureInPictureControllerDidStartPictureInPicture(_:)中，添加以下代码： dismiss(animated: true, completion...添加以下代码： // 1 if let presentedViewController = presentedViewController { // 2 presentedViewController.dismiss

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Runtime运用:埋点统计

关于循环引用问题

初探 Core ML：学习建立一个图像识别 App

Swift 学习Using Swift mix and match, network: 写rss读者

Combine-常见使用场景

iOS14开发-UIViewController

iOS对UIViewController生命周期和属性方法的解析

iOS - 聊聊 autorelease 和 @autoreleasepool

【GitLab CICD】：条件、分支（rules）

复制的官方GitLab 文档

fio基础3

iOS12、iOS11、iOS10、iOS9常见适配

SpringBoot项目集成QuartzJob任务

【Hooks】：Awesome React Hooks

CPU Idle Time Management

golang:各种异步等待集合

Three bugs in the Go MySQL Driver

【TypeScript】：functions、types

SpringBoot 集成 Quartz，一文搞定任务调度

AVKit框架详细解析（二） —— 基于视频播放器的画中画实现（一）

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