目前我使用我的uiwebview上的按钮返回用户搜索的每个网页,并且它的工作效果很好.但是,无论如何使用导航栏后退按钮返回以前的网页,当没有更多的页面返回时,然后打开以前的视图控制器?
继续使用的代码是返回,它只是连接到UIButton.
// Back button events
func onBackButton_Clicked(sender: UIButton)
{
if(webview.canGoBack)
{
webview.goBack()
}
}
Run Code Online (Sandbox Code Playgroud)
任何帮助都会很棒.
我在点击时尝试获取ListView中项目的位置时遇到了一些麻烦.
继承我的代码:
public MainPage()
{
InitializeComponent();
Results();
}
async void Results()
{
var service = new RestService();
response = await service.GetEventItemsAsync();
Debug.WriteLine("Found: " + response.Count + " events");
listView.ItemsSource = response;
listView.ItemTapped += async (sender, e) =>
{
// Get position of item tapped
};
}
Run Code Online (Sandbox Code Playgroud)
任何帮助将不胜感激.
解决了
不得不将ItemTapped更改为ItemSelected
然后在ItemSelected里面我刚才添加了这一行:
var i = (listView.ItemsSource as List<EventItems>).IndexOf(e.SelectedItem as EventItems);
Run Code Online (Sandbox Code Playgroud) 我正在为Swift中的iOS项目工作.此应用程序涉及在UITableView中显示JSON数据.
我已经解析了JSON数据,但它没有显示在tableview上.当我运行我的应用程序时,它给了我这个错误:
由于未捕获的异常'NSInternalInconsistencyException'而终止应用程序,原因:'无法使用标识符Cell将单元格出列 - 必须为标识符注册一个nib或类或连接一个storyboard中的原型单元格'
我试图以编程方式执行所有操作,而不是使用故事板.我将在下面添加我的代码.
import UIKit
import Foundation
class TableViewController: UITableViewController
{
var postsCollection = [Post]()
var service: PostService!
override func awakeFromNib()
{
super.awakeFromNib()
}
override func viewDidLoad()
{
super.viewDidLoad()
service = PostService()
service.getPosts
{
(response) in
self.loadPosts(response["Events"]! as! NSArray)
}
}
func loadPosts(events: NSArray)
{
for event in events
{
//var event = event["Events"]! as! NSDictionary
print("\n-----------------------------------------------------")
print(" RECEIVED_JSON_DATA")
print("-----------------------------------------------------")
print("Title : \(event["Title"])")
print("Event Description : \(event["EventDescription"])")
print("Event Location : \(event["EventLocation"])")
print("Event StartTime : \(event["EventStartTime"])")
print("Event EndTime …Run Code Online (Sandbox Code Playgroud) 我有一些问题,设置一个控制台应用程序,将推送通知发送到iOS/Android设备.
错误显示如下:
Unhandled Exception: System.AggregateException: One or more errors
occurred. ---System.UnauthorizedAccessException: The remote server
returned an error: (401)
Unauthorized..TrackingId:ea158550-8761-41f8-821d-dbcb88fcce56,TimeStamp:18/07/2016
08:58:21 ---System.Net.WebException: The remote server returned an
error: (401) Unauthorized. at
System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
at
Microsoft.Azure.NotificationHubs.NotificationRequestAsyncResult`1.<GetAsyncSteps>b__3(TAsyncResult
thisPtr, IAsyncResult r) at
Microsoft.Azure.NotificationHubs.Messaging.IteratorAsyncResult`1.StepCallback(IAsyncResult
result) --- End of inner exception stack trace ---
Server stack trace:
Exception rethrown at [0]: at
Microsoft.Azure.NotificationHubs.Common.AsyncResult.End[TAsyncResult](IAsyncResult
result) at
Microsoft.Azure.NotificationHubs.NotificationHubManager.EndSendNotification(IAsyncResult
result) at
System.Threading.Tasks.TaskFactory`1.FromAsyncCoreLogic(IAsyncResult
iar, Func`2 endFunction, Action`1 endAction, Task`1 promise, Boolean
requiresSynchronization) --- End of inner exception stack trace --- …Run Code Online (Sandbox Code Playgroud) c# azure apple-push-notifications google-cloud-messaging azure-notificationhub