自定义自动呈现的登录按钮(推荐)
如需创建具有自定义设置的 Google 登录按钮,请在登录页面中添加一个包含登录按钮的元素,编写一个使用您的样式和范围设置调用 signin2.render()
的函数,并添加包含查询字符串 onload=YOUR_RENDER_FUNCTION
的 https://apis.google.com/js/platform.js
脚本。
以下示例展示了一个指定自定义样式参数的 Google 登录按钮:
以下 HTML、JavaScript 和 CSS 代码会生成上方的按钮:
<html>
<head>
<meta name="google-signin-client_id" content="YOUR_CLIENT_ID.apps.googleusercontent.com">
</head>
<body>
<div id="my-signin2"></div>
<script>
function onSuccess(googleUser) {
console.log('Logged in as: ' + googleUser.getBasicProfile().getName());
}
function onFailure(error) {
console.log(error);
}
function renderButton() {
gapi.signin2.render('my-signin2', {
'scope': 'profile email',
'width': 240,
'height': 50,
'longtitle': true,
'theme': 'dark',
'onsuccess': onSuccess,
'onfailure': onFailure
});
}
</script>
<script src="https://apis.google.com/js/platform.js?onload=renderButton" async defer></script>
</body>
</html>
您还可以为自定义 Google 登录按钮指定设置,方法是将 data-
属性定义为具有类 g-signin2
的 div
元素。例如:
<div class="g-signin2" data-width="300" data-height="200" data-longtitle="true">
使用自定义图形构建按钮
您可以构建一个符合您网站设计的 Google 登录按钮。您必须遵循品牌推广指南,并在按钮中使用适当的颜色和图标。品牌推广指南还提供了可用于设计按钮的图标资源。此外,您还必须确保您的按钮的显眼程度与其他第三方登录选项一样。
以下是使用自定义图形构建的 Google 登录按钮示例:
以下 HTML、JavaScript 和 CSS 代码会生成上方的按钮:
<html>
<head>
<link href="https://fonts.googleapis.com/css?family=Roboto" rel="stylesheet" type="text/css">
<script src="https://apis.google.com/js/api:client.js"></script>
<script>
var googleUser = {};
var startApp = function() {
gapi.load('auth2', function(){
// Retrieve the singleton for the GoogleAuth library and set up the client.
auth2 = gapi.auth2.init({
client_id: 'YOUR_CLIENT_ID.apps.googleusercontent.com',
cookiepolicy: 'single_host_origin',
// Request scopes in addition to 'profile' and 'email'
//scope: 'additional_scope'
});
attachSignin(document.getElementById('customBtn'));
});
};
function attachSignin(element) {
console.log(element.id);
auth2.attachClickHandler(element, {},
function(googleUser) {
document.getElementById('name').innerText = "Signed in: " +
googleUser.getBasicProfile().getName();
}, function(error) {
alert(JSON.stringify(error, undefined, 2));
});
}
</script>
<style type="text/css">
#customBtn {
display: inline-block;
background: white;
color: #444;
width: 190px;
border-radius: 5px;
border: thin solid #888;
box-shadow: 1px 1px 1px grey;
white-space: nowrap;
}
#customBtn:hover {
cursor: pointer;
}
span.label {
font-family: serif;
font-weight: normal;
}
span.icon {
background: url('/identity/sign-in/g-normal.png') transparent 5px 50% no-repeat;
display: inline-block;
vertical-align: middle;
width: 42px;
height: 42px;
}
span.buttonText {
display: inline-block;
vertical-align: middle;
padding-left: 42px;
padding-right: 42px;
font-size: 14px;
font-weight: bold;
/* Use the Roboto font that is loaded in the <head> */
font-family: 'Roboto', sans-serif;
}
</style>
</head>
<body>
<!-- In the callback, you would hide the gSignInWrapper element on a
successful sign in -->
<div id="gSignInWrapper">
<span class="label">Sign in with:</span>
<div id="customBtn" class="customGPlusSignIn">
<span class="icon"></span>
<span class="buttonText">Google</span>
</div>
</div>
<div id="name"></div>
<script>startApp();</script>
</body>
</html>