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swift - 删除具有子对象的 RLMObject 时,Realm.io 'RLMArray is no longer valid'

在我的应用程序中,在尝试删除包含与另一个RLMObject的一对多关系的RLMObject时,我不断收到“RLMException”,原因:“RLMArray不再有效”。例如:'Task'是RLMObject,它包含一个RLMArray'records',其中类型为'Record'RLMObjects。抛出错误的代码如下:publicclassfuncdeleteTask(#taskName:String,retainRecords:Bool){letrealm=Database.getRealm()letcurrentTask=(Task.objectsWhere("name='\(

ios - 为非用户对象保存获取 "User cannot be saved unless they have been authenticated via logIn or signUp"

这太奇怪了。昨晚开始出现,今天早上消失了,现在又出现了。我正在尝试将当前用户保存为关注者,将另一个用户保存为关注对象。代码是:letfollow=PFObject(className:"Follow")follow["follower"]=PFUser.currentUser()follow["following"]=["__type":"Pointer","className":"_User","objectId":objectId]follow.saveInBackgroundWithBlock{(success,error)->Voidiniferror!=nil{print(e

swift - 他们是否对哪个 body 是 body 和 body 什么时候开始做出任何保证(_ :) is called?

当调用funcdidBegin(_contact:SKPhysicsContact)的SKScene中发生接触时,需要确定哪个SKPhysicsBody是contact.bodyA和contact.bodyB。但是,我一直没有成功地发现在调用函数之前是如何设置的。这会导致不成功的向下转换(例如(contact.bodyA.node!as!MySpriteNode)导致应用程序崩溃。我的模式理论涉及到它是由应用程序节点树中的SKNode对象的顺序或它们在场景的self.childen中的顺序决定的,但是这已被证明是不正确的。有时,在self.children中晚于bodyB.node的节

Ubuntu pyaudio安装报错:ERROR: Could not build wheels for pyaudio, which is required to install pyproject

报错信息如下:(pytorch)fish@asus:~/文档/speech_rec$pipinstallpyaudioCollectingpyaudioDownloadingPyAudio-0.2.13.tar.gz(46kB)━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━46.8/46.8kB367.6kB/seta0:00:00Installingbuilddependencies...doneGettingrequirementstobuildwheel...donePreparingmetadata(pyproject.toml)...doneBuil

insightface安装过程中提示 Microsoft Visual C++ 14.0 or greater is required.

pipinstallinsightface安装过程中提示 MicrosoftVisualC++14.0orgreaterisrequired.Getitwith"MicrosoftC++BuildTools":https://visualstudio.microsoft.com/visual-cpp-build-tools/ 根据提示网站访问官网下载生成工具 打开软件后会自动更新环境,然后勾选下图中文件安装后重新执行pipinstallinsightface即可完成安装  

swift - 在 Swift 3.1 中,UnsafeMutablePointer.initialize(from :) is deprecated

在Swift3.1中,不推荐使用UnsafeMutablePointer.initialize(from:)。Xcode建议我改用UnsafeMutableBufferPointer.initialize(from:)。我有一个看起来像这样的代码块:letpointer=UnsafeMutablePointer.allocate(capacity:64)pointer.initialize(from:repeatElement(0,count:64))由于弃用,代码给了我一个编译时警告。所以我要把它改成:letpointer=UnsafeMutablePointer.allocate(

docker: Error response from daemon: Conflict. The container name is already in use by container You

问题:docker启动docker容器时报错docker:Errorresponsefromdaemon:Conflict.ThecontainernameisalreadyinusebycontainerYouhavetoremove(orrename)thatcontainertobeabletoreusethatname.解决办法:在此之前已经启动了相同名字的docker容器,ThecontainernameisalreadyinusebycontainerYouhavetoremove(orrename)thatcontainertobeabletoreusethatname删除这个c

ios - xamarin iOS : Location Request how to find out when user clicks “Allow” or “Don' t allow” is clicked

应用加载时,系统会提示用户启用位置权限。只有当用户在该弹出窗口中点击“允许”或“不允许”时,我才想移动到下一页。我看到了一些问题,例如this但他们没有帮助。我的代码:varlocationManager=newCLLocationManager();locationManager.AuthorizationChanged+=(objectsender,CLAuthorizationChangedEventArgse)=>{if(ee.Status==CLAuthorizationStatus.AuthorizedAlways||ee.Status==CLAuthorizationSt

为何出现Java HotSpot(TM) 64-Bit Server VM warning: Sharing is only supported for boot loader classes ...

当在IDEA中连接Redis时出现"JavaHotSpot™64-BitServerVMwarning:Sharingisonlysupportedforbootloaderclassesbecausebootstrapclasspathhasbeenappended"错误,通常是因为类加载器(ClassLoader)的共享机制引发的警告。Java的类加载机制涉及到BootstrapClassLoader、ExtensionClassLoader和ApplicationClassLoader。BootstrapClassLoader负责加载核心类库,ExtensionClassLoader负责

ios - "type of expression is ambiguous without more context"- 引用 appDelegate

我的appDelegate最初是用Obj-C编写的。我试图在一个新的Swift类中访问它,但我遇到了一个我认为具有误导性的奇怪错误,我正试图找到根源。在我的Swift文件中,我在以下位置设置了一个断点:varappDelegate=UIApplication.sharedApplication().delegate如果我只是po:poappDelegate我得到:PrintingdescriptionofappDelegate:Optional()一切都很好。但是,当我尝试:poappDelegate.navigationController在调试控制台中我得到:error::1:13