安装elementary OS 5.0 Juno后必做的事
安装elementary OS 5.0 Juno后必做的事
换阿里的源+添加额外的源
换阿里的源,编辑/etc/apt/source.list文件，内容换成以下文本：
12345deb http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiverse deb-src http://mirrors.aliyun.com/ubuntu/ bionic main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiversedeb-src http://mirrors.aliyun.com/ubuntu/ bionic-security main restricted universe multiversedeb http://mirrors.aliyun.com/ubuntu/ bionic-updates main multiv ...
在gradle中设置打包秘钥及输出apk名称
在gradle中设置打包秘钥及输出apk名称12345678910111213141516171819202122232425262728def projectName = "projectName"android {signingConfigs { debug { storeFile file("./debug.keystore") storePassword '123456' keyAlias 'key0' keyPassword '123456' } release { storeFile file("./debug.keystore") storePassword '123456' keyAlias ...
Android uri转真实路径
Android uri转真实路径从手机中选择文件,并读取内容的时候,选择下载下来的文件,突然程序崩溃了.抓了下日志,发现报以下错误:
java.lang.NumberFormatException: For input string: “raw:/storage/emulated/0/Download/browser/图片收藏/200832810200350_2.jpg”
修改如下:
1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192939495969798991001011021031041051061071081091101111121131141151161171181191201211221231241251261271281291301311321331341351361371 ...
定时截图并发送到邮箱
1392b2da79a7da20ae679e815d65e13d2922d55df2f416ee7782665fe8539a175bc35750b34df30ee5711a6ee5b21ecc2d66afcb99e1d67a883ab88dde0f4276399b33bd65a38498d5582ec0fc80371c576d633bdd470f3d10f163814daf92dc249a907fbe7fb1843a5431f53eb83e91f34a4adf5221d98f18e27d2ddad990cafc0108ca314826c6c9d3193997bcacc4ca3ee8b37058ce1911e7f7be6e20286d005ff461258b55296d22ccb0b72fd047aec1e5bab59aadeef61e3ea56887a2e2a49cc6cc3d11b81718c08717a10bc05a2d4ae0e0ab7753321214a9b77a9937b8ab2ebd4128761abc5a26e1a6dc0dfa1d69d240bc5a3e233e2 ...
JS浮点数16进制与10进制之间的转换
JS浮点数16进制与10进制之间的转换天猫精灵IoT平台自定义脚本时,需要将浮点数在16进制与10进制之间进行转换.设备端发过来的浮点数是16进制的,而显示到网页上的浮点数是10进制的.
使用ArrayBuffer DataView TypeArray进行转换12345678910111213141516171819202122232425var aa = 123.45;// 打印16进制buffervar floatArr1 = new Float32Array([aa]);var buffer1 = floatArr1.buffer;var intArr1 = new Int8Array(buffer1);intArr1.forEach(function(val){ console.log((val & 0xFF).toString(16).toUpperCase());});// buffer转10进制var intArr2 = new Int8Array([0x42, 0xF6, 0xE6, 0x66]);var buffer2 = intAr ...
three.js 材质
three.js 材质
原文链接： http://www.imooc.com/article/290194
纯CSS实现动态晴阴雨雪
纯CSS实现动态晴阴雨雪
.weather {
position: relative;
display: inline-block;
width: 180px;
height: 240px;
background: #23b7e5;
border-radius: 8px;
}
.sunny:before {
content: "";
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%, -50%);
width: 60px;
height: 60px;
background: #F6D963;
border-radius: 50%;
box-shadow: 0 0 20px #ff0;
z-index: 2;
}
.sunny:after {
content: "";
position: absolute;
top: 50%;
left: ...
BLE开发
1392b2da79a7da20ae679e815d65e13d2922d55df2f416ee7782665fe8539a175bc35750b34df30ee5711a6ee5b21ecc2d66afcb99e1d67a883ab88dde0f4276399b33bd65a38498d5582ec0fc80371c576d633bdd470f3d10f163814daf92dc249a907fbe7fb1843a5431f53eb83e91f34a4adf5221d98f18e27d2ddad990cafc0108ca314826c6c9d3193997bcacc4ca3ee8b37058ce1911e7f7be6e20286d005ff461258b55296d22ccb0b72fd047aec1e5bab59aadeef61e3ea56887a2e2a49cc6cc3d11b81718c08717a10bc05a2d4ae0e0ab7753321214a9b77a9937b8ab2ebd4128761abc5a26e1a6dc0dfa1d69d240bc5a3e233e2 ...
iOS13 适配
iOS13 适配iOS 13 的 presentViewController 默认有视差效果，模态出来的界面现在默认都下滑返回。 一些页面必须要点确认才能消失的，需要适配。如果项目中页面高度全部是屏幕尺寸，那么多出来的导航高度会出现问题。
1234// Swiftself.modalPresentationStyle = .fullScreen// Objective-Cself.modalPresentationStyle = UIModalPresentationFullScreen;
CBCentralManager，iOS13以前，使用蓝牙时可以直接用，不会出现权限提示，iOS13后，再使用就会提示了。在info.plist里增加NSBluetoothAlwaysUsageDescription
在使用iOS 13运行项目时突然APP就crash掉了。定位到的问题是在设置UITextField的Placeholder也就是占位文本的颜色和字体时使用了KVC的方法：
12[_textField setValue:[UIColor redColor] forKeyPath:@&q ...
360压缩
360压缩再也不用担心传统压缩的共享版、40天试用期、购买许可、破解版、修正版这些东西了，360压缩永久免费，用的放心！
运行平台：Windows
下载地址：https://yasuo.360.cn/