我到目前为止所发现的是公共获取和私人集合的场景,如下所示.
private(set) var distanceTravelled: Double
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我反过来想要它.当然以下是行不通的.
private(get) public var distanceTravelled: Double
Run Code Online (Sandbox Code Playgroud) 在搜索过程中,我想禁用“刷新”机制。因此,我禁用了刷新控件并将其删除。但是,当下拉刷新时,将调用beginRefresh方法,并且像刷新一样,单元格将保持关闭状态2秒钟。
func searchBarShouldBeginEditing(searchBar: UISearchBar) -> Bool {
resultSearchController.searchBar.selectedScopeButtonIndex = 0
refreshControl!.enabled = false
refreshControl?.removeFromSuperview()
return true
}
Run Code Online (Sandbox Code Playgroud) 为什么我会进入一个应该是android.os.NetworkOnMainThreadException的AsyncTask?我认为AsyncTask是解决这个问题的方法.这个例外是在第7行.
private class ImageDownloadTask extends AsyncTask<String, Integer, byte[]> {
@Override
protected byte[] doInBackground(String... params) {
try {
URL url = new URL(params[0]);
URLConnection connection = url.openConnection();
InputStream inputStream = connection.getInputStream();
ByteArrayOutputStream byteBuffer = new ByteArrayOutputStream();
int bufferSize = 1024;
byte[] buffer = new byte[bufferSize];
int len;
while ((len = inputStream.read(buffer)) != -1) {
byteBuffer.write(buffer, 0, len);
}
return byteBuffer.toByteArray();
} catch (IOException ex) {
return new byte[0];
}
}
}
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我想用它来下载图片.
public byte[] getProfilePicture(Context context, String id) {
String url …Run Code Online (Sandbox Code Playgroud) 如果重新加载页面(单击其中一项),如何使手风琴和子手风琴保持打开状态?我是否必须编写一个自己的函数来保存在页面重新加载时打开它们时打开的项目,或者是否可以使用 bootstrap.js 的内置 javascript?
<div id="MainMenu">
<div class="list-group">
<a href="#menu0" class="list-group-item" data-toggle="collapse" data-parent="#MainMenu">Holz</a>
<div id="menu0" class="collapse">
<a href="/products/index/11" class="list-group-subitem">A</a>
<a href="/products/index/12" class="list-group-subitem">B</a>
<a href="/products/index/13" class="list-group-subitem">C</a>
<a href="/products/index/14" class="list-group-subitem">D</a>
<a href="#menu0_1" class="list-group-subitem" data-toggle="collapse" data-parent="#MainMenu">E</a>
<div id="menu0_1" class="collapse">
<a href="/products/index/15" class="list-group-subitem">E1</a>
<a href="/products/index/16" class="list-group-subitem">E2</a>
</div>
</div>
</div>
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