每个人我都是Ruby on Rails的新手,我需要了解一些东西.我有一个实例变量(@users),我需要在html.erb文件中循环它限制次数.我已经用过了:
<% @users.each do |users| %>
<%= do something %>
<%end %>
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但是,我需要将其限制为10次.我能做什么?
我想让用户使用Google+登录.我在Google开发者控制台中创建了该项目,我获得了客户端ID,并在Android Studio中安装了Google Play服务.(我的运行设备有Android 4.4.2)当应用程序运行时我按下登录按钮会出现一个Toast消息:"Internal Error"
Logcat中的错误如下:
error ConnectionResult{statusCode=SIGN_IN_REQUIRED, resolution=PendingIntent{429ffe38: android.os.BinderProxy@429ffdd8}}
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请注意,在用户按下按钮之前出现此错误,事实上,通过调试,我发现它来自此行代码:
Log.e(TAG, "error " + result.toString());
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在方法中:
public void onConnectionFailed(ConnectionResult result) {
if (!mGoogleIntentInProgress) {
/* Store the ConnectionResult so that we can use it later when the user clicks on the Google+ login button */
mGoogleConnectionResult = result;
if (mGoogleLoginClicked) {
/* The user has already clicked login so we attempt to resolve all errors until the user is signed in,
* or they cancel. */
resolveSignInError();
} else …Run Code Online (Sandbox Code Playgroud) authentication android login google-plus android-pendingintent