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原创 My Github
JHRequestDebugView - 请求调试窗口https://github.com/xjh093/JHRequestDebugView现在可以看看，隐藏在3840后面，真正的“凶手”了！JHHolderTextView - textView with placeholderhttps://github.com/xjh093/JHHolderTextViewJHCategories - 常用U
2017-11-17 11:55:14
1017
原创 iOS 修改 tabbar 图标大小 01
frame 依旧是原来的尺寸，但是 bounds 变了！bounds 就缩小了 4 倍！在点击 tabbar 时，通过修改图片的。属性，来修改图片大小。你会发现，根本改不动！
2024-08-21 14:48:05
533
原创 Mac 分享 WIFI 后，iPhone 连接 WIFI，但无法上网
【代码】Mac 分享 WIFI 后，iPhone 连接 WIFI，但无法上网。
2024-05-30 15:13:34
632
原创 iOS cocoapods pod FrozenError and RuntimeError
1、更新 CocoaPods 到与 Xcode 兼容的版本。凭我多年的经验，我修改了一下这个地方，居然没报错了！2、清理 CocoaPods 缓存。
2024-04-10 18:33:52
991
原创 Python UnicodeDecodeError: ‘gbk‘ codec can‘t decode character ‘\xa5‘ in position 0
这个错误出现的场景是这样的：通过request获取网页内容使用bs4解析数据在把数据写入文件时出现了这个错误应该是编码问题。
2024-02-20 18:44:59
480
原创 Python UnicodeDecodeError: ‘gbk‘ codec can‘t decode byte 0xa4 in position 49
这个错误出现的场景是这样的：我把一个在 Mac 电脑生成的.txt文件拷贝到了 Windows 电脑上在读取.txt文件内容时出现了这个错误应该是编码问题。
2024-02-20 18:38:09
615
原创 iOS 关于 SocketRocket 报错 _utf8_nextCharSafeBody
【代码】iOS 关于 SocketRocket 报错 _utf8_nextCharSafeBody。
2023-11-16 11:23:36
265
原创 iOS Xcode15 适配：Other Linker Flags：-ld_classic
Xcode 14毛问题都没有，Xcode 15崩溃。
2023-10-27 10:32:25
2153
1
原创 iOS unable to find utility “pngcrush“, not a developer tool or in PATH
很奇怪，还很蛋疼 T_T前一秒还能Build成功，运行后一秒直接网上查找了一番，也没什么结果。
2023-05-30 16:46:27
798
原创 iOS xcode14 Application circumvented Objective-C runtime dealloc initiation for ＜XXX＞ object
iOS16 Xcode14 适配
2023-04-13 16:24:47
555
原创 【Swift 60秒】97 - Optionals: Summary
You've made it to the end of the tenth part of this series, so let's summarize:
2023-02-23 10:17:19
464
原创 【Swift 60秒】96 - Typecasting
Swift must always know the type of each of your variables, but sometimes you know more information than Swift does. For example, here are three classes:
2023-02-21 10:07:51
465
原创 【Swift 60秒】95 - Failable initializers
When talking about force unwrapping, I used this code:
2023-02-17 10:40:34
537
原创 【Swift 60秒】94 - Optional try
Back when we were talking about throwing functions, we looked at this code:
2023-02-15 10:29:10
530
原创 【Swift 60秒】93 - Optional chaining
Swift provides us with a shortcut when using optionals: if you want to access something like `a.b.c` and `b` is optional, you can write a question mark after it to enable optional chaining: `a.b?.c`.
2023-02-14 16:44:47
504
原创 【Swift 60秒】92 - Nil coalescing
The `nil coalescing` operator unwraps an optional and returns the value inside if there is one. If there *isn't* a value - if the optional was `nil` - then a default value is used instead. Either way, the result won't be optional: it will either by the val
2023-02-13 09:30:56
509
原创 【Swift 60秒】91 - Implicitly unwrapped optionals
Like regular optionals, implicitly unwrapped optionals might contain a value or they might be nil. However, unlike regular optionals you don't need to unwrap them in order to use them: you can use them as if they weren't optional at all.
2023-02-10 11:08:27
433
原创 【Swift 60秒】90 - Force unwrapping
Optionals represent data that may or may not be there, but sometimes you know for **sure** that a value isn't nil. In these cases, Swift lets you force unwrap the optional: convert it from an optional type to a non-optional type.
2023-02-08 11:06:59
589
原创 【Swift 60秒】89 - Unwrapping with guard
An alternative to if let is guard let, which also unwraps optionals. guard let will unwrap an optional for you, but if it finds nil inside it expects you to exit the function, loop, or condition you used it in.
2023-02-07 10:00:46
364
原创 iOS UIViewController 的 view 的 safeAreaInsets
在 2 个方法内 `viewDidLoad` 、`viewDidLayoutSubviews` 测试 `safeAreaInsets` 的具体值
2023-02-06 16:16:10
967
原创 【Swift 60秒】88 - Unwrapping optionals
Optional strings might `contain` a string like "Hello" or they might be `nil` - nothing at all.
2023-02-06 10:27:06
677
Animatable Properties.pdf
2020-08-06
ISO_IEC_14496-1_2010.pdf
2017-01-03
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