小编Aja*_*van的帖子

当字段为TextInput空时，光标会跳到右端。

<TextInput 
    autoCorrect={ false }
    keyboardType="number-pad"
    autoCapitalize="none"
    placeholder="Inactivity time in seconds"
    onChangeText={ (value) => this.setState({ inactivityTime: value }) }
    value={ this.state.inactivityTime }
    style={ commons.pinInput } />

prop仅当的值TextInput设置为 时才会发生此问题state。

我们正在构建一个聊天应用程序，一对一聊天是该应用程序的主要目的，所以现在，消息传递速度是我们的首要任务。我们需要一个后端解决方案，我们最初计划使用 Firebase 实时数据库。但后来 Firestore 出现了，从那时起，我们看到了 Firebase 团队对 Firestore 而非实时数据库的许多建议。

我们同时使用了实时数据库和 Firestore，因此我们非常了解两者的功能和查询能力。对于我们在功能方面的用例，它们中的任何一个都可以。但正如我之前所说，我们主要关心的是消息传递速度。那么哪个更实时呢？

我是Google Cloud Platform的新手。我已经使用Google Cloud SDK在AppEngine Flexible Environment中部署了Python 3 Flask应用程序，并且该应用程序运行良好。我只想查看在云中部署的源文件。有什么办法可以在GCP中查看我的项目文件？

如何在 Firebase 云功能中使用 Firebase Admin SDK 为 Firestore 文档创建文档推送 ID。

我知道如何使用 AngularFire2 在 Angular 中做到这一点

const bookingId = this.afs.createId();

我需要在我的云功能中做这件事。

我需要在文件浏览器和图库中隐藏图像（不是文件夹）而不更改文件位置。我尝试在文件名前加上.它的前缀以隐藏文件浏览器中的图像，但仍显示在图库中。有没有办法从图库中隐藏图像？

我在 build.gradle 文件中添加了另外 2 个 buildTypes staging，并prestaging与release. 当我构建并运行releasebuildType 时，它​​在真实设备上工作正常，但是当我构建并运行staging或prestaging构建时，两者都会在启动时崩溃。设备上的崩溃报告显示以下错误：

所有构建都可以在 iOS 上正常运行

我从头开始使用内联样式创建了一个电子邮件模板。HTML现在我需要添加一些图像，此时无法使用 url，因为它没有托管。我尝试使用 base64 编码，它在 Apple 邮件客户端中有效，但图像未在 Gmail 中呈现。有没有办法在所有电子邮件客户端都支持的 html 中嵌入图像？

我正在尝试创建一个TextView带有自定义字体系列的字体。我已经创建了一个支持普通字体的字体。但我无法在自定义上实现粗体/斜体TextView样式。

这是我的自定义TextView课程

public class KTextView extends TextView {

    public KTextView(Context context) {
        super(context);
        TypefaceHelper.setTypeface(context, this);
    }

    public KTextView(Context context, AttributeSet attrs) {
        super(context, attrs);
        TypefaceHelper.setTypeface(context, this);
    }

    public KTextView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        TypefaceHelper.setTypeface(context, this);
    }

}

这是TypefaceHelper班级

public class TypefaceHelper {
private static final String FONT = "AvenirNext-Regular.otf";

private static Typeface typeface = null;

public static void setTypeface(Context context, TextView textView) {
    if …

我想创建6个<a>具有不同背景颜色和图像的标签。所有颜色和图像均为静态数据。我应该对所有<a>标签进行硬编码还是将其*ngFor用于数组？它们之间在性能上有什么区别吗？

> Ld
> /Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/MyApp.app/MyApp
> normal x86_64 (in target 'MyApp' from project 'MyApp')
>     cd /Users/ajaysivan/MyApp/OfflineUpgrade/MyApp-offline-app/ios
>     /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang
> -target x86_64-apple-ios9.0-simulator -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator13.2.sdk
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/BVLinearGradient
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/DoubleConversion
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/FBReactNativeSpec
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/Folly
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/RCTTypeSafety
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/RNDeviceInfo
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/RNVectorIcons
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/React-Core
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/React-CoreModules
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/React-RCTActionSheet
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/React-RCTAnimation
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/React-RCTBlob
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/React-RCTImage
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/React-RCTLinking
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/React-RCTNetwork
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/React-RCTSettings
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/React-RCTText
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/React-RCTVibration
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/React-cxxreact
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/React-jsi
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/React-jsiexecutor
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/React-jsinspector
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/ReactCommon
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/Sentry
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/SentryReactNative
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/Yoga
> -L/Users/ajaysivan/Library/Developer/Xcode/DerivedData/MyApp-fhlxfvymksoqhsglhalddkzaekrm/Build/Products/Debug-iphonesimulator/glog
> …

我正在开发一个具有minSdkVersion = 16的应用程序,我需要在Lollipop及以上版本中使用涟漪效果,并在较低版本上使用其他一些效果.
有没有办法用XML做到这一点？