我目前正在尝试基于Realm-JSON的 RealmSwift JSON支持，但却被<?xml version="1.0" encoding="utf-8"?>
<CommandTable xmlns="http://schemas.microsoft.com/VisualStudio/2005-10-18/CommandTable" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<!-- This is the file that defines the actual layout and type of the commands.
It is divided in different sections (e.g. command definition, command
placement, ...), with each defining a specific set of properties.
See the comment before each section for more details about how to
use it. -->
<!-- The VSCT compiler (the tool that translates this file into the binary
format that VisualStudio will consume) has the ability to run a preprocessor
on the vsct file; this preprocessor is (usually) the C++ preprocessor, so
it is possible to define includes and macros with the same syntax used
in C++ files. Using this ability of the compiler here, we include some files
defining some of the constants that we will use inside the file. -->
<!--This is the file that defines the IDs for all the commands exposed by VisualStudio. -->
<Extern href="stdidcmd.h" />
<!--This header contains the command ids for the menus provided by the shell. -->
<Extern href="vsshlids.h" />
<!--The Commands section is where commands, menus, and menu groups are defined.
This section uses a Guid to identify the package that provides the command defined inside it. -->
<Commands package="guidDanBarPackage">
<!-- Inside this section we have different sub-sections: one for the menus, another
for the menu groups, one for the buttons (the actual commands), one for the combos
and the last one for the bitmaps used. Each element is identified by a command id that
is a unique pair of guid and numeric identifier; the guid part of the identifier is usually
called "command set" and is used to group different command inside a logically related
group; your package should define its own command set in order to avoid collisions
with command ids defined by other packages. -->
<Menus>
<Menu guid="guidDanBarPackageCmdSet" id="MyToolbar" type="Toolbar">
<CommandFlag>DefaultDocked</CommandFlag>
<Strings>
<ButtonText>Dan Bar</ButtonText>
<CommandName>Dan Bar</CommandName>
</Strings>
</Menu>
</Menus>
<Menus>
<Menu guid="guidDanBarPackageCmdSet" id="BriefToolbar" type="Toolbar">
<CommandFlag>DefaultDocked</CommandFlag>
<Strings>
<ButtonText>Dan Brief Bar</ButtonText>
<CommandName>Dan Brief Bar</CommandName>
</Strings>
</Menu>
</Menus>
<!-- In this section you can define new menu groups. A menu group is a container for
other menus or buttons (commands); from a visual point of view you can see the
group as the part of a menu contained between two lines. The parent of a group
must be a menu. -->
<Groups>
<Group guid="guidDanBarPackageCmdSet" id="MyToolbarGroup" priority="0x0000">
<Parent guid="guidDanBarPackageCmdSet" id="MyToolbar" />
</Group>
<Group guid="guidDanBarPackageCmdSet" id="BriefToolbarGroup" priority="0x0000">
<Parent guid="guidDanBarPackageCmdSet" id="BriefToolbar" />
</Group>
</Groups>
<!--Buttons section. -->
<!--This section defines the elements the user can interact with, like a menu command or a button
or combo box in a toolbar. -->
<Buttons>
<!--To define a menu group you have to specify its ID, the parent menu and its display priority.
The command is visible and enabled by default. If you need to change the visibility, status, etc, you can use
the CommandFlag node.
You can add more than one CommandFlag node e.g.:
<CommandFlag>DefaultInvisible</CommandFlag>
<CommandFlag>DynamicVisibility</CommandFlag>
If you do not want an image next to your command, remove the Icon node /> -->
<Button guid="guidDanBarPackageCmdSet" id="cmdidConcurrentBuilds" priority="0x0100" type="Button">
<Parent guid="guidDanBarPackageCmdSet" id="MyToolbarGroup" />
<Icon guid="guidDanBarImages" id="bmpPic1" />
<Strings>
<ButtonText>Set Concurrent Builds</ButtonText>
</Strings>
</Button>
<Button guid="guidDanBarPackageCmdSet" id="cmdidTrackInSolutionExplorer" priority="0x0100" type="Button">
<Parent guid="guidDanBarPackageCmdSet" id="MyToolbarGroup" />
<Icon guid="guidDanBarImages" id="bmpPic2" />
<Strings>
<ButtonText>Track In Solution Explorer</ButtonText>
</Strings>
</Button>
<Button guid="guidDanBarPackageCmdSet" id="cmdidBuildStartupProject" priority="0x0100" type="Button">
<Parent guid="guidDanBarPackageCmdSet" id="MyToolbarGroup" />
<Icon guid="guidDanBarImages" id="bmpPic3" />
<Strings>
<ButtonText>Build Startup Project</ButtonText>
</Strings>
</Button>
<Button guid="guidDanBarPackageCmdSet" id="cmdidCommentOutParam" priority="0x0100" type="Button">
<Parent guid="guidDanBarPackageCmdSet" id="MyToolbarGroup" />
<Icon guid="guidDanBarImages" id="bmpPic4" />
<Strings>
<ButtonText>Comment Out Parameter</ButtonText>
</Strings>
</Button>
<Button guid="guidDanBarPackageCmdSet" id="cmdidInsertRegion" priority="0x0100" type="Button">
<Parent guid="guidDanBarPackageCmdSet" id="MyToolbarGroup" />
<Icon guid="guidDanBarImages" id="bmpPic5" />
<Strings>
<ButtonText>Insert Region</ButtonText>
</Strings>
</Button>
<Button guid="guidDanBarPackageCmdSet" id="cmdidXMLCommentFull" priority="0x0100" type="Button">
<Parent guid="guidDanBarPackageCmdSet" id="MyToolbarGroup" />
<Icon guid="guidDanBarImages" id="bmpPic6" />
<Strings>
<ButtonText>Full XML Comment</ButtonText>
</Strings>
</Button>
<Button guid="guidDanBarPackageCmdSet" id="cmdidXMLCommentSmall" priority="0x0100" type="Button">
<Parent guid="guidDanBarPackageCmdSet" id="MyToolbarGroup" />
<Icon guid="guidDanBarImages" id="bmpPic7" />
<Strings>
<ButtonText>Small XML Comment</ButtonText>
</Strings>
</Button>
<Button guid="guidDanBarPackageCmdSet" id="cmdidXMLCommentTiny" priority="0x0100" type="Button">
<Parent guid="guidDanBarPackageCmdSet" id="MyToolbarGroup" />
<Icon guid="guidDanBarImages" id="bmpPic8" />
<Strings>
<ButtonText>Tiny XML Comment</ButtonText>
</Strings>
</Button>
<Button guid="guidDanBarPackageCmdSet" id="cmdidXMLCommentMember" priority="0x0100" type="Button">
<Parent guid="guidDanBarPackageCmdSet" id="MyToolbarGroup" />
<Icon guid="guidDanBarImages" id="bmpPic9" />
<Strings>
<ButtonText>Member XML Comment</ButtonText>
</Strings>
</Button>
<Button guid="guidVSStd97" id="cmdidMoreWindows" priority="0x0100" type="Button">
<Parent guid="guidDanBarPackageCmdSet" id="MyToolbarGroup" />
<Icon guid="guidDanBarImages" id="bmpPic10" />
<Strings>
<ButtonText>Win...</ButtonText>
</Strings>
</Button>
<!--BRIEF buttons-->
<Button guid="guidDanBarPackageCmdSet" id="cmdidBriefAltD" priority="0x0100" type="Button">
<Parent guid="guidDanBarPackageCmdSet" id="BriefToolbarGroup" />
<Icon guid="guidBriefBarImages" id="bmpPic1" />
<Strings>
<ButtonText>Brief Alt D - Line Delete</ButtonText>
</Strings>
</Button>
<Button guid="guidDanBarPackageCmdSet" id="cmdidBriefAltMinus" priority="0x0100" type="Button">
<Parent guid="guidDanBarPackageCmdSet" id="BriefToolbarGroup" />
<Icon guid="guidBriefBarImages" id="bmpPic3" />
<Strings>
<ButtonText>Brief Num-Minus - Line Cut</ButtonText>
</Strings>
</Button>
<Button guid="guidDanBarPackageCmdSet" id="cmdidBriefAltPlus" priority="0x0100" type="Button">
<Parent guid="guidDanBarPackageCmdSet" id="BriefToolbarGroup" />
<Icon guid="guidBriefBarImages" id="bmpPic4" />
<Strings>
<ButtonText>Brief Num-Plus - Line Copy</ButtonText>
</Strings>
</Button>
<Button guid="guidDanBarPackageCmdSet" id="cmdidBriefAltC" priority="0x0100" type="Button">
<Parent guid="guidDanBarPackageCmdSet" id="BriefToolbarGroup" />
<Icon guid="guidBriefBarImages" id="bmpPic2" />
<Strings>
<ButtonText>Brief Alt C - Block Select</ButtonText>
</Strings>
</Button>
<Button guid="guidDanBarPackageCmdSet" id="cmdidBriefLinePaste" priority="0x0100" type="Button">
<Parent guid="guidDanBarPackageCmdSet" id="BriefToolbarGroup" />
<Icon guid="guidBriefBarImages" id="bmpPic5" />
<Strings>
<ButtonText>Brief Insert - Line Paste</ButtonText>
</Strings>
</Button>
</Buttons>
<!--The bitmaps section is used to define the bitmaps that are used for the commands.-->
<Bitmaps>
<!-- The bitmap id is defined in a way that is a little bit different from the others:
the declaration starts with a guid for the bitmap strip, then there is the resource id of the
bitmap strip containing the bitmaps and then there are the numeric ids of the elements used
inside a button definition. An important aspect of this declaration is that the element id
must be the actual index (1-based) of the bitmap inside the bitmap strip. -->
<Bitmap guid="guidDanBarImages" href="Resources\DanBar.png" usedList="bmpPic1, bmpPic2, bmpPic3, bmpPic4, bmpPic5, bmpPic6, bmpPic7, bmpPic8, bmpPic9, bmpPic10" />
<Bitmap guid="guidBriefBarImages" href="Resources\BriefBar.png" usedList="bmpPic1, bmpPic2, bmpPic3, bmpPic4, bmpPic5, bmpPic6" />
</Bitmaps>
</Commands>
<KeyBindings>
<KeyBinding guid="guidDanBarPackageCmdSet" id="cmdidXMLCommentSmall" editor="guidVSStd97" key1="q" mod1="Alt" />
<KeyBinding guid="guidDanBarPackageCmdSet" id="cmdidBriefAltD" editor="guidVSStd97" key1="d" mod1="Alt" />
<KeyBinding guid="guidDanBarPackageCmdSet" id="cmdidBriefAltMinus" editor="guidVSStd97" key1="VK_SUBTRACT" />
<KeyBinding guid="guidDanBarPackageCmdSet" id="cmdidBriefAltPlus" editor="guidVSStd97" key1="VK_ADD" />
<KeyBinding guid="guidDanBarPackageCmdSet" id="cmdidBriefAltC" editor="guidVSStd97" key1="c" mod1="Alt" />
<KeyBinding guid="guidDanBarPackageCmdSet" id="cmdidBriefLinePaste" editor="guidVSStd97" key1="VK_INSERT" />
</KeyBindings>
<Symbols>
<!-- This is the package guid. -->
<GuidSymbol name="guidDanBarPackage" value="{69fa005b-6bae-4a69-84e6-ed7cf75cc180}" />
<!-- This is the guid used to group the menu commands together -->
<GuidSymbol name="guidDanBarPackageCmdSet" value="{a2ce5715-189e-4bfc-bc37-4d1b6e0c1122}">
<IDSymbol name="MyToolbar" value="0x1000" />
<IDSymbol name="MyToolbarGroup" value="0x1050" />
<IDSymbol name="BriefToolbar" value="0x1100" />
<IDSymbol name="BriefToolbarGroup" value="0x1150" />
<IDSymbol name="cmdidConcurrentBuilds" value="256" />
<IDSymbol name="cmdidTrackInSolutionExplorer" value="257" />
<IDSymbol name="cmdidBuildStartupProject" value="258" />
<IDSymbol name="cmdidCommentOutParam" value="259" />
<IDSymbol name="cmdidXMLCommentFull" value="260" />
<IDSymbol name="cmdidXMLCommentSmall" value="261" />
<IDSymbol name="cmdidXMLCommentTiny" value="262" />
<IDSymbol name="cmdidXMLCommentMember" value="263" />
<IDSymbol name="cmdidInsertRegion" value="264" />
<IDSymbol name="cmdidBriefAltD" value="270" />
<IDSymbol name="cmdidBriefAltMinus" value="271" />
<IDSymbol name="cmdidBriefAltPlus" value="272" />
<IDSymbol name="cmdidBriefAltC" value="273" />
<IDSymbol name="cmdidBriefLinePaste" value="274" />
</GuidSymbol>
<GuidSymbol name="guidDanBarImages" value="{ffb25733-9517-4411-bae2-4deda791fd6c}">
<IDSymbol name="bmpPic1" value="1" />
<IDSymbol name="bmpPic2" value="2" />
<IDSymbol name="bmpPic3" value="3" />
<IDSymbol name="bmpPic4" value="4" />
<IDSymbol name="bmpPic5" value="5" />
<IDSymbol name="bmpPic6" value="6" />
<IDSymbol name="bmpPic7" value="7" />
<IDSymbol name="bmpPic8" value="8" />
<IDSymbol name="bmpPic9" value="9" />
<IDSymbol name="bmpPic10" value="10" />
</GuidSymbol>
<GuidSymbol name="guidBriefBarImages" value="{f1a36fcd-2c27-4151-ae23-42fff88c212c}">
<IDSymbol name="bmpPic1" value="1" />
<IDSymbol name="bmpPic2" value="2" />
<IDSymbol name="bmpPic3" value="3" />
<IDSymbol name="bmpPic4" value="4" />
<IDSymbol name="bmpPic5" value="5" />
<IDSymbol name="bmpPic6" value="6" />
</GuidSymbol>
</Symbols>
</CommandTable>
困住了。我将扩展名移到initWithDictionary，自动生成的快速代码如下所示：
RLMObjectBase这对我来说似乎没问题。但是Realm的extension RLMObjectBase {
.....
public init!(JSONDictionary dictionary: [NSObject : AnyObject]!)
public func JSONDictionary() -> [NSObject : AnyObject]!
....
}
（Object的子类）由于某种原因没有继承RLMObjectBase。它不可用。
任何建议将不胜感激。
答案 0 :(得分：3)
只有在没有定义自己的初始值设定项时，子类才会继承超类初始值设定项。
您只能在RLMObjectBase类扩展名中定义便捷初始值设定项：
extension RLMObjectBase {
...
convenience init!(JSONDictionary dictionary: [NSObject : AnyObject]!) { ... }
...
}
如果它没有初始值设定项，它们将由子类继承：
class MyCustomRLMObject: RLMObjectBase {
// no initializers
...
}
let object = MyCustomRLMObject(JSONDictionary: d)
如果仅在您的应用程序中使用它，则不需要将其设为public。
类似的示例，但适用于UIViewController：
extension UIViewController {
convenience init(nibName: String) {
self.init(nibName: nibName, bundle: nil)
}
}
class MyViewController: UIViewController {
}
let vc = MyViewController(nibName: "MyViewController")