在我的导航栏中，我放了一个条形按钮，我为背景设置了一个图像。但是图像的大小远远大于按钮的大小。所以我试着解决这个问题，如下：
override func viewDidAppear(_ animated: Bool) {
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 5, height: 5 ))
imageView.contentMode = .center
let image = UIImage(named: "Info")
imageView.image = image
info_btn.image = image
}
答案 0 :(得分：0)
尝试<!DOCTYPE html>
<html>
<head>
<title>Inzend Opgave H5</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<!-- style sheets -->
<link href="style.css" rel="stylesheet" type="text/css" >
</head>
<body>
<div id="wrapper">
<section class="container">
<form id="personInfo" name="myForm">
<table>
<tbody id="table">
<tr>
<td>nr.</td>
<td>First Name</td>
<td>Last Name</td>
<td>Age</td>
<td>Country</td>
</tr>
</tbody>
</table>
<input type="text" name="firstName" placeholder="firstName">
<input type="text" name="lastName" placeholder="lastName">
<input type="text" name="Age" placeholder="Age">
<select name="Country">
<option value="choose a country">Kies een land</option>
<option value="Nederland">NL</option>
<option value="Belgie">BE</option>
<option value="Duitsland">DE</option>
</select>
<input type="button" name="button" id="btn" class="btn" value="Add the input fields to the table">
<p>To remove a table number fill in the input field with the <br> number of the table and click remove table row</p>
<input type="button" name="button" id="removeRowBtn" class="btn" value="remove table row" style="width: 75%;">
<input type="text" name="TableNr" id="tableNr" placeholder="table nr.">
</form>
</section>
</div>
<!-- java-scripts -->
<script type="text/javascript" src="script.js"></script>
<script type="text/javascript" src="http://code.jquery.com/jquery-1.6.2.js"></script>
<script type="text/javascript">
var cw = $('.container').width();
$('.container').css({
'height': cw + 'px'
});
</script>
</body>
</html>