关于ios：今日扩展”无法加载”

Today Extension "Unable To Load"

我正在使用 Parse 将数据加载到我的 Today Extension 中，然后更新我的 Widget 文本字段。

当我运行我的代码时似乎没有问题，事实上，为了调试我的扩展中的代码，我将该函数复制到我的主应用程序中并运行它，以便我可以看到输出(我知道它可以调试小部件，但它似乎是一个非常混乱和麻烦的过程)。所有的输出都是正确的，所以当它在我的小部件中不起作用时，我完全傻眼了。

我认为它在我的小部件扩展中不起作用，因为我在小部件视图中获得了"无法加载"文本字段。

我使用的函数叫做"update_widget"，我在我的Widget "TodayViewController"中的"super.viewDidLoad()"中调用"update_widget"

我是否以错误的方式更新我的小部件？

关于为什么会这样的任何想法？

"TodayViewController.swift" 的代码如下。假设 Parse ID 和查询 ID 是正确的，而不是 "HiFriends"。假设 Day 类已编写并且工作正常。最后请记住，如果我将 "update_widget" 粘贴到我的主应用程序 "AppDelegate.swift" 中，所有输出都是正确的并且不会发生崩溃。深入研究。

另外，如果它有帮助，我注意到在显示"无法加载"之前，小部件会显示"正在加载"，我在"update_widget"函数中查询之前会打印它。

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//
// TodayViewController.swift
// WidgetExtention
//
// Created by Vishnu Murale on 6/9/15.
// Copyright (c) 2015 Vishnu Murale. All rights reserved.
//

import UIKit
import NotificationCenter
import Parse

class TodayViewController: UIViewController, NCWidgetProviding {

@IBOutlet weak var WidgetText: UILabel!
let BlockOrder = ["A","B","C","D","E","F","G"]

var Schedule = PFObject(className:"Schedule")
let defaults = NSUserDefaults.standardUserDefaults()

override func viewDidLoad() {
super.viewDidLoad()

Parse.setApplicationId("HiFriends",
clientKey:"HiFriends")

self.update_widget()

}

func find_Minutes(hour_before : Int, hour_after : Int)->Int{

var num_hours_less = Int(hour_before/100)
var num_hours_more = Int(hour_after/100)

var diff_hours = num_hours_more-num_hours_less

var diff_minutes = hour_after%100 - hour_before%100

return diff_hours*60 + diff_minutes;

}

override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}

func substring(origin :String, StartIndex : Int, EndIndex : Int)->String{
var counter = 0
var subString =""
for char in origin{

if(StartIndex <= counter && counter < EndIndex){
subString += String(char)
}

counter++;

}

return subString

}

func widgetPerformUpdateWithCompletionHandler(completionHandler: ((NCUpdateResult) -> Void)!) {

}

func update_widget() -> Bool{

var Success = false;

var Days = [Day]()

var query = PFQuery(className:"Schedule")

self.WidgetText.text = "Loading"

query.getObjectInBackgroundWithId("HiFriends")
{
(SchedObj: PFObject?, error: NSError?) -> Void in
if error == nil && SchedObj != nil {
var Widget_Block = [Array<String>]()
var Time_Block = [Array<String>]()
Widget_Block.removeAll()
Time_Block.removeAll()
println("Retrived Information Successful")

self.Schedule = SchedObj!
print(self.Schedule)
var Monday = Day(name:"Monday")
var Tuesday = Day(name:"Tuesday")
var Wednesday = Day(name:"Wednesday")
var Thursday = Day(name:"Thursday")
var Friday = Day(name:"Friday")
if(self.Schedule["MondayBlock"] != nil && self.Schedule["MondayTime"] != nil){
var bO: Array<String> = self.Schedule["MondayBlock"] as! Array<String>
var t: Array<String> = self.Schedule["MondayTime"] as! Array<String>
Widget_Block.append(bO)
Time_Block.append(t)
Monday.refreshDay(bO, times: t)
}
if(self.Schedule["TuesdayBlock"] != nil && self.Schedule["TuesdayTime"] != nil){
var bO: Array<String> = self.Schedule["TuesdayBlock"] as! Array<String>
var t: Array<String> = self.Schedule["TuesdayTime"] as! Array<String>
Widget_Block.append(bO)
Time_Block.append(t)
Tuesday.refreshDay(bO, times: t)
}
if(self.Schedule["WednesdayBlock"] != nil && self.Schedule["WednesdayTime"] != nil){
var bO: Array<String> = self.Schedule["WednesdayBlock"] as! Array<String>
var t: Array<String> = self.Schedule["WednesdayTime"] as! Array<String>
Widget_Block.append(bO)
Time_Block.append(t)
Wednesday.refreshDay(bO, times: t)
}
if(self.Schedule["ThursdayBlock"] != nil && self.Schedule["ThursdayTime"] != nil){
var bO: Array<String> = self.Schedule["ThursdayBlock"] as! Array<String>
var t: Array<String> = self.Schedule["ThursdayTime"] as! Array<String>
Widget_Block.append(bO)
Time_Block.append(t)
Thursday.refreshDay(bO, times: t)
}
if(self.Schedule["FridayBlock"] != nil && self.Schedule["FridayTime"] != nil){
var bO: Array<String> = self.Schedule["FridayBlock"] as! Array<String>
var t: Array<String> = self.Schedule["FridayTime"] as! Array<String>
Widget_Block.append(bO)
Time_Block.append(t)
Friday.refreshDay(bO, times: t)
}
Days.append(Monday)
Days.append(Tuesday)
Days.append(Wednesday)
Days.append(Thursday)
Days.append(Friday)
var currentDateTime = Monday.getDate_AsString()
var Day_Num = Monday.getDayOfWeek_fromString(currentDateTime)
var User_Info = [String]()
let defaults = NSUserDefaults.standardUserDefaults()
if(defaults.objectForKey("ButtonTexts") != nil){
User_Info = defaults.objectForKey("ButtonTexts") as! Array<String>
}
var Switch_Info = [Bool]()
if(defaults.objectForKey("SwitchValues") != nil){
Switch_Info = defaults.objectForKey("SwitchValues") as! Array<Bool>
}
println("")
println("Finding Widget Date ...")
var End_Times = [Int]()
if(self.Schedule["EndTimes"] != nil){
End_Times = self.Schedule["EndTimes"] as! Array<Int>
}

var minutes_until_nextblock = 0;
var blockName_Widget =""

if(Day_Num >= 0 && Day_Num <= 4){

for i in reverse(0...Widget_Block[Day_Num].count-1){

var dateAfter = Time_Block[Day_Num][i]
var CurrTime = Monday.NSDateToStringWidget(NSDate())
var End_Time_String =""
if(i+1 <= Widget_Block[Day_Num].count-1){
End_Time_String = Time_Block[Day_Num][i+1]
}

println("Date After :" + dateAfter)
println("Current Date :" + CurrTime)

var hour4 = self.substring(dateAfter,StartIndex: 1,EndIndex: 3)
hour4 = hour4 + self.substring(dateAfter,StartIndex: 4,EndIndex: 6)

var hour2 = self.substring(CurrTime,StartIndex: 1,EndIndex: 3)
hour2 = hour2 + self.substring(CurrTime,StartIndex: 4,EndIndex: 6)

var end_time = self.substring(End_Time_String,StartIndex: 1,EndIndex: 3)
end_time = end_time + self.substring(End_Time_String,StartIndex: 4,EndIndex: 6)

var hour_one = hour4.toInt()
var hour_two = hour2.toInt()
var hour_after = end_time.toInt()

println("Blcok Date hour :")
print(hour_one)
println("Current Date hour:")
print(hour_two)
println("After Date hour :")
println(hour_after)

if(i == Widget_Block[Day_Num].count-1 && hour_two >= hour_one){

var EndTime = End_Times[Day_Num]
if(hour_two! - EndTime < 0){

minutes_until_nextblock = self.find_Minutes(hour_two!, hour_after: (EndTime-5))

println("Miuntes until next blok" + String(minutes_until_nextblock))
if(minutes_until_nextblock > 0){
blockName_Widget = Widget_Block[Day_Num][i]
}
else{
blockName_Widget ="GETTOCLASS"
}
}
else{
println("After School")
blockName_Widget ="NOCLASSNOW"
}

break;

}

if(hour_two >= hour_one){

minutes_until_nextblock = self.find_Minutes(hour_two!, hour_after: (hour_after!-5))

println("Miuntes unitl next block" + String(minutes_until_nextblock))

if(minutes_until_nextblock > 0){

blockName_Widget = Widget_Block[Day_Num][i]
}
else{
blockName_Widget ="GETTOCLASS"
}

break;
}

}

}

if(blockName_Widget ==""){

blockName_Widget ="NOCLASSNOW"

}

println("Found the block name Widget" + blockName_Widget )

if(blockName_Widget =="NOCLASSNOW"){

println("NO Class Now")

}
else if(blockName_Widget =="GETTOCLASS"){

println("Passing Time")

}
else{

var firstLunch = Switch_Info[Day_Num]

for (date,block) in Days[Day_Num].time_to_block{
var message = block;
var block_copy = block;

if(count(block_copy) == 2) {

if(firstLunch && block_copy.hasSuffix("1")){

message ="Lunch"

}
else if(!firstLunch && block_copy.hasSuffix("2")){

message ="Lunch"

}
else{

var counterDigit = 0;

for i in block_copy{

if(counterDigit == 0){
block_copy = String(i)
}

counterDigit++;

}

}
}

if(find(self.BlockOrder,block_copy) != nil){

var indexOfUserInfo = find(self.BlockOrder,block_copy)!

if(User_Info[indexOfUserInfo] !=""){
message = User_Info[indexOfUserInfo]

}
}

if(block == blockName_Widget){
println("have found widget block" + block)
println("Message on Widget" + message)
self.WidgetText.text = message
break;

}

}

}

Success = true;

} else {

println("Information not received succesfully")
}
}
return Success
}

}