小编Asy*_*nc-的帖子

我在iOS10中安排新通知,如下所示:

func scheduleNotification (event : Meeting, todaysBadgeCounter: Int) {

    if #available(iOS 10.0, *) {

        let minutesBefore = 10
        //interval in seconds from current point in time to notification
        let interval : NSTimeInterval = NSTimeInterval(secondsFromNowTo(event.startTime.dateByAddingTimeInterval(-minutesBefore * 60)))

        //only schedule in the future
        if(interval > 0){


            let category = NotificationsController.notificationCategory

            let center = NotificationsController.notificationCenter
            center.setNotificationCategories([category])
            let content = UNMutableNotificationContent()

            content.title = NSString.localizedUserNotificationStringForKey(event.title, arguments: nil)
            if(minutesBefore <= 1){
                content.body = NSString.localizedUserNotificationStringForKey("IOS10: Your \(event.title) is about to start", arguments: nil)
            }else{
                content.body = NSString.localizedUserNotificationStringForKey("IOS10: …

我正在尝试从iphone上的URL加载图像,图像在那里,我可以在safari中使用相同的链接打开它,但不能在应用程序中打开它:

Error Domain=NSURLErrorDomain Code=-1003 "A server with the specified hostname 
could not be found." UserInfo={NSUnderlyingError=0x17024f810 
{Error Domain=kCFErrorDomainCFNetwork Code=-1003 "(null)" 
UserInfo={_kCFStreamErrorCodeKey=50331647, _kCFStreamErrorDomainKey=6147928288}},
 NSErrorFailingURLStringKey=https://........, NSErrorFailingURLKey=https://.........

请求代码:

func downloadImage(userEmail: String, onCompletion: @escaping (UIImage) -> Void) {
    print("Download Started")
    let route = "\(baseURL as String)\(userEmail as String)\(baseURLparameters as String)"
    let url = URL(string: route)

    getDataFromUrl(url: url!) { (data, response, error)  in
        guard let data = data, error == nil else {
            print("===failed:", error ?? "dunno")
            print("===url:", url?.absoluteString ?? "dunno")
            return
        }
        print(response?.suggestedFilename ?? url!.lastPathComponent …

我有一个拆分视图控制器,左侧有一个项目列表,右侧有一个详细视图.AppDelegate中的相关代码:

let splitViewController = mainView.instantiateViewControllerWithIdentifier("initial") as! UISplitViewController



        let rightNavController = splitViewController.viewControllers.last as! UINavigationController
        let detailViewController = rightNavController.topViewController as! DetailsIpad

        let leftNavController = splitViewController.viewControllers.first as! UINavigationController
        let masterViewController = leftNavController.topViewController as! MainViewController

        masterSplitViewController = masterViewController
        detailSplitViewController = detailViewController

        // Override point for customization after application launch.
        let navigationController = splitViewController.viewControllers[splitViewController.viewControllers.count-1] as! UINavigationController
        navigationController.topViewController!.navigationItem.leftBarButtonItem = splitViewController.displayModeButtonItem()
        splitViewController.delegate = self

        self.window!.rootViewController = splitViewController

当我第一次启动应用程序时,我发现拆分屏幕的右侧部分占用了所有屏幕:

如果我旋转屏幕,它会被正确设置(可能因为两个视图都出现在屏幕上):

当我在任何地方设置断点时,我看到右侧的详细视图在左侧的主视图(项目列表)之前加载,尽管没有直接调用.我无法更改分屏的视图的调用顺序.我怎样才能解决这个问题？

更新:

我可以在显示拆分视图控制器之前设置它:

splitViewController.preferredDisplayMode = UISplitViewControllerDisplayMode.AllVisible

在我打印时,在分割控制器的ViewDidLoad中:

print(self.preferredDisplayMode.rawValue)

我得到:2,这是AllVisible.但结果仍然相同.

我需要在Xcode中为Unit Test创建多个日历事件.由于访问权限请求,呼叫需要是异步的:

 eventStore.requestAccess(to: EKEntityType.event, completion: {
            granted, error in
             //create events
     })

这是在setUp()循环中完成的,以创建多个事件.问题是,当测试开始运行时,并非所有完成块都已完成.我已实施该waitForExpectations()方法,使其等到计数器满足要求.但是我收到以下错误消息:

Stall on main thread

这是相关的代码 - setUp:

override func setUp()
{

    super.setUp()

    if let filepath = Bundle.main.path(forResource: "MasterCalendar", ofType: "csv") {
        do {

            let expectationCreation = expectation(description: "create events expectation")
            let contents = try String(contentsOfFile: filepath)
            //print(contents)

            let testDataArray = importTestDataArrayFrom(file: contents)



            createTestEvents(testDataArray: testDataArray)
                { (eventsArray) in
                    self.testEvents = eventsArray
                    print("finished creating events")
                    expectationCreation.fulfill()
            }

            waitForExpectations(timeout: 10.0) { (error) in
                if error != …

我正在尝试从通知中实施操作.到目前为止,我能够触发正确的委托功能,但点击后应用程序不会被带到前台.

相关代码:

@available(iOS 10.0, *)
func registerCategory() -> Void{
    print("register category")
    let callNow = UNNotificationAction(identifier: "call", title: "Call now", options: [])
    let clear = UNNotificationAction(identifier: "clear", title: "Clear", options: [])
    let category : UNNotificationCategory = UNNotificationCategory.init(identifier: "IDENT123", actions: [callNow, clear], intentIdentifiers: [], options: [])

    let center = UNUserNotificationCenter.currentNotificationCenter()
    center.setNotificationCategories([category])
}

@available(iOS 10.0, *)
func scheduleNotification(event : String, interval: NSTimeInterval) {

    print("schedule ", event)

    let content = UNMutableNotificationContent()

    content.title = event
    content.body = "body"
    content.categoryIdentifier = "CALLINNOTIFICATION"
    let trigger = UNTimeIntervalNotificationTrigger.init(timeInterval: …

我正在尝试创建一个自动扩展的自定义单元格.我正在使用这个github示例:https://github.com/rcdilorenzo/Cell-Expander

这一行给出了运行时错误SIGABRT:

override func tableView(tableView: UITableView, willDisplayCell cell: UITableViewCell, forRowAtIndexPath indexPath: NSIndexPath) {
    (cell as! EventTableViewCell).watchFrameChanges()
    //Could not cast value of type 'UITableViewCell' (0x105aa1b80) to 'AppName.EventTableViewCell' (0x104287fe0).
}

我也检查了这篇文章的答案,接着是三个步骤,但没有运气: 无法将'UITableViewCell'类型的值转换为'(AppName).(CustomCellName)'

我的自定义单元类看起来像这样:

import UIKit

class EventTableViewCell : UITableViewCell {
...
}

的cellForRowAtIndexPath:

override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier( "eventCell", forIndexPath: indexPath)

    let date = self.eventArray[indexPath.row].startTime
    let calendar = NSCalendar.currentCalendar()
    let minutes = calendar.component(NSCalendarUnit.Minute, fromDate: date)
    var minutesString: String
    if (minutes …

如果单击“操作”，则通知setAutoCancel（true）不起作用

我有一个通知，其中包含操作。当我点击通知时，它将从列表中删除。但是，当我单击“操作”时，它成功完成了该操作（即拨打电话），但是当我返回到通知列表时，它仍然存在。AlarmReceiver的相对代码：

public class AlarmReceiver extends BroadcastReceiver {
Meeting meeting;

/**
 * Handle received notifications about meetings that are going to start
 */
@Override
public void onReceive(Context context, Intent intent) {

    // Get extras from the notification intent
    Bundle extras = intent.getExtras();
    this.meeting = extras.getParcelable("MeetingParcel");

    // build notification pending intent to go to the details page when click on the body of the notification
    Intent notificationIntent = new Intent(context, MeetingDetails.class);
    notificationIntent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    notificationIntent.putExtra("MeetingParcel", meeting);      // send meeting that we received to …

我试图在for循环中安排一系列通知.安排后,我正在阅读所有待处理的通知(仅用于测试目的).

调度(从for循环调用):

func scheduleNotification (event : Meeting, todaysBadgeCounter: Int) {
 if #available(iOS 10.0, *) {

        let minutesBefore = CallIn.Settings.notifyNumberOfMinutesBeforeEvent
        let notifyBefore = UNNotificationAction(identifier: NotificationActions.NotifyBefore.rawValue, title: "Notification", options: [])
        let category = UNNotificationCategory(identifier: "CALLINNOTIFICATION", actions: [notifyBefore], intentIdentifiers: [], options: [])


        UNUserNotificationCenter.currentNotificationCenter().setNotificationCategories([category])
        let content = UNMutableNotificationContent()

        content.title = NSString.localizedUserNotificationStringForKey(event.title, arguments: nil)
        if(minutesBefore <= 1){
            content.body = NSString.localizedUserNotificationStringForKey("Your \(event.title) is about to start", arguments: nil)
        }else{
            content.body = NSString.localizedUserNotificationStringForKey("You have \(event.title) in \(Int(minutesBefore)) minutes", arguments: nil)

        }
        content.sound = UNNotificationSound.defaultSound()

        //interval in seconds …

我正在使用UNUserNotificationCenter实施新通知.但我需要保持向后兼容,因此我在所有地方都进行了检查:

if #available(iOS 10.0, *) { ... }
else { ... }

这似乎在iOS10中运行良好.为了能够使用UNUserNotificationCenter框架,我必须导入:

import NotificationCenter

但它崩溃了iOS9.3,因为它不知道它是什么.它是一个编译时动作,而不是运行时动作 - 所以它意味着我不能在imports上放置条件.如果我创建一个单独的类,并且放

@available(iOS 10.0, *)
class ....

那里的进口也在课堂实施之前发生. 我应该如何解决这个问题？

我有一个应用程序，它从远程 API 获取带有图像 URL 的项目列表，然后它必须从该项目位置内的给定 url 获取每个项目的图像。问题是，当上下滚动并因此从视图中删除列表项并将它们移回到视图中时，它们确实会出现。然而，在初始加载时，它们永远保持“加载”状态，直到移出和移入。我的代码：

import SwiftUI

struct ContentView: View {

    @EnvironmentObject var artObjectStore: ArtObjectStore
    @State private var pageCount = 1
    @State private var tappedLink: String? = nil
    @Environment(\.imageCache) var cache: ImageCache

    var body: some View {
        NavigationView {
            Form {

                Section(header: Text("Art")) {

                    List {
                        ForEach(artObjectStore.artObjects, id: \.self) { artObject in
                            self.link(for: artObject)

                        }
                        Button(action: loadMore) {
                            Text("")
                        }
                        .onAppear {
                            DispatchQueue.global(qos: .background).asyncAfter(deadline: DispatchTime(uptimeNanoseconds: 10)) {
                                self.loadMore()
                            }
                        }
                    }
                }
            }
            .navigationBarTitle("Art objects")
        }
        .onAppear(perform: loadMore) …