我正在尝试为主页设置背景图像.我从屏幕的开始处获取图像位置并填充宽度而不是高度.我在代码中遗漏了什么吗？是否有颤振的图像标准？图像是否根据每部手机的屏幕分辨率进行缩放？
class BaseLayout extends StatelessWidget{
@override
Widget build(BuildContext context){
return new Scaffold(
body: new Container(
child: new Column(
mainAxisAlignment: MainAxisAlignment.start,
children: [
new Image.asset("assets/images/bulb.jpg")
]
)
)
);
}
}
我正在尝试使用Google图表生成甘特图,并在使用现有的PHP代码进行相应编码后,我得到一个空白的HTML.请帮助我成功显示图表.
<html>
<head>
<!--Load the AJAX API-->
<script type="text/javascript" src="https://www.google.com/jsapi"></script>
<script type="text/javascript" src="//ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js"></script>
<script type="text/javascript">
// Load the Visualization API and the gantt chart package.
google.load("visualization", "1", {packages: ["timeline"]});
// Set a callback to run when the Google Visualization API is loaded.
google.setOnLoadCallback(drawChart);
function drawChart() {
$.ajax({
url: "http://localhost:8080/index1.php",
dataType:"json",
async: false ,
success: function(data) {
jsonData = data;
}
});
// Create our data table out of JSON data loaded from server.
var data = new google.visualization.DataTable(jsonData);
// Instantiate …