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ios - NSInternalInconsistencyException : 'Invalid parameter not satisfying: !stayUp || CLClientIsBackgroundable(internal->fClient)'

我试图让我的应用程序在Xcode7beta中运行,但我遇到了这个异常:NSInternalInconsistencyException:'Invalidparameternotsatisfying:!stayUp||CLClientIsBackgroundable(internal->fClient)'这是调用堆栈:0CoreFoundation0x00000001063a89b5__exceptionPreprocess+1651libobjc.A.dylib0x0000000105e20debobjc_exception_throw+482CoreFoundation0x00000

iphone - 如何解决警告: Sending 'ViewController *const __strong' to parameter of incompatible type 'id<AVAudioPlayerDelegate>?

以下代码给出了Sending'ViewController*const__strong'toparameterofincompatibletype'id'的警告(就是下面代码中的第三行):NSURL*sound0URL=[NSURLfileURLWithPath:[[NSBundlemainBundle]pathForResource:@"0"ofType:@"aiff"]];audioPlayer0=[[AVAudioPlayeralloc]initWithContentsOfURL:sound0URLerror:nil];[audioPlayer0setDelegate:self]

iOS 6 : How do I restrict some views to portrait and allow others to rotate?

我有一个iPhone应用程序,它使用UINavigationController来呈现一个向下钻取的界面:第一个View,然后是另一个View,最多四个层次。我希望前三个View仅限于纵向,只有最后一个View可以旋转为横向。当从第四个View返回到第三个和第四个View时,我希望所有内容都旋转回纵向。在iOS5中,我只是在我的每个ViewController中定义了shouldAutorotateToInterfaceOrientation:以针对允许的方向返回YES。一切都按上述方式工作,包括返回纵向,即使设备在从ViewController#4返回到#3时处于横向。在iOS6中,

flutter - 错误 : The argument type '(int) → dynamic' can't be assigned to the parameter type '(String) → void'

我有一些字段发布String和int,String字段工作正常,我在数据库中获取这些值,在int类型字段中,我收到此错误消息。Theargumenttype'(int)→dynamic'can'tbeassignedtotheparametertype'(String)→void'.我正在使用bloc发布到firebase数据库。这是它的样子。Widgetbuild(BuildContextcontext){finaltrackerBloc=Provider.of(context);StringdocId=DateTime.now().millisecondsSinceEpoch.to

flutter - 错误 : The argument type 'MaterialPageRoute' can't be assigned to the parameter type 'Route<Map>'

我正在学习flutter,这段代码直接来自老师。我知道flutter一直在变化,这可能就是它没有运行的原因。不管怎样,它是:classKlimaticextendsStatefulWidget{@override_KlimaticStatecreateState()=>new_KlimaticState();}class_KlimaticStateextendsState{String_cityEntered;Future_goToNextScreen(BuildContextcontext)async{Mapresults=awaitNavigator.of(context).pus

dart - flutter 错误 :The argument type 'Future<Image>' can't be assigned to the parameter type 'Widget'

我在使用flutterflame库时遇到了这个错误Theargumenttype'Future'can'tbeassignedtotheparametertype'Widget'.我的代码是:import'package:flutter/material.dart';import'package:flame/flame.dart';classTileMapextendsStatefulWidget{@override_TileMapStatecreateState()=>_TileMapState();}class_TileMapStateextendsState{@overrideW

list - 使用 ListView 时出现错误 : The named parameter 'children' isn't defined,

我正在使用Firebase实时数据库检索信息,然后将其呈现在可滚动的数据表中。为了使DataTable可滚动,我将它包装在一个ListView中,按照这篇文章的评论:DataTable-makescrollable,setbackgroundcolourandfix/freezeheaderrowandfirstcolumn这是我的代码:import'package:flutter/material.dart';import'package:firebase_database/firebase_database.dart';import'cprdata.dart';import'dar

dart - 错误 : The argument type '() → Null' can't be assigned to the parameter type '(Null) → FutureOr<dynamic>'

import'package:flutter/material.dart';import'package:camera/camera.dart';classRegisterextendsStatefulWidget{Listcameras;@override_RegistercreateState(){return_Register();}Register(this.cameras);}class_RegisterextendsState{CameraControllercontroller;@overrideWidgetbuild(BuildContextcontext){retur

dart - 错误 : The argument type '(File) → Future<dynamic>' can't be assigned to the parameter type '(dynamic) → FutureOr<dynamic>'

我正在尝试编译示例:https://github.com/dart-lang/googleapis_examples/blob/master/drive_upload_download_console/bin/main.dart我得到以下Dart编译错误error:Theargumenttype'(File)→Future'can'tbeassignedtotheparametertype'(dynamic)→FutureOr'.(argument_type_not_assignableatlib/google_api_rest/main.dart:49)来自以下代码://Downlo

parameters - Flutter:将传递的参数更改为 "StatefulWidget"

我有一个名为BounceContainer的StatefulWidget。此类包含一个参数child,就像典型的Flutter小部件一样。基本上,只要用户点击它,它就会弹出child。我现在传递child参数的方式如下:classBounceContainerextendsStatefulWidget{finalWidgetchild;//Declaring"child"BounceContainer({this.child});//Initializing"child"//Passing"child"toState@override_BounceContainerStatecreat