把xib文件转换成objective-C代码

如何将XIB文件转换为Object-C源程序呢？

使用nib2objc这么一个小工具就可以了，该工具的作者是akosma，你可以通过https://github.com/akosma/nib2objc下载到这个工具的源代码。

下载的工程代码并用XCode编译，生成一个命令行程序文件nib2objc。然后执行如下命令开始转换。

nib2objc 1.xib > 1.m

如果1.xib的内容如下：

<?xml version="1.0" encoding="UTF-8"?>
<archive type="com.apple.InterfaceBuilder3.CocoaTouch.XIB" version="7.10">
<data>
<int key="IBDocument.SystemTarget">800</int>
<string key="IBDocument.SystemVersion">10C540</string>
<string key="IBDocument.InterfaceBuilderVersion">759</string>
<string key="IBDocument.AppKitVersion">1038.25</string>
<string key="IBDocument.HIToolboxVersion">458.00</string>
<object class="NSMutableDictionary" key="IBDocument.PluginVersions">
<string key="NS.key.0">com.apple.InterfaceBuilder.IBCocoaTouchPlugin</string>
<string key="NS.object.0">77</string>
</object>
<object class="NSMutableArray" key="IBDocument.EditedObjectIDs">
<bool key="EncodedWithXMLCoder">YES</bool>
<integer value="6"/>
</object>
<object class="NSArray" key="IBDocument.PluginDependencies">
<bool key="EncodedWithXMLCoder">YES</bool>
<string>com.apple.InterfaceBuilder.IBCocoaTouchPlugin</string>
</object>
<object class="NSMutableDictionary" key="IBDocument.Metadata">
<bool key="EncodedWithXMLCoder">YES</bool>
<object class="NSArray" key="dict.sortedKeys" id="0">
<bool key="EncodedWithXMLCoder">YES</bool>
</object>
<object class="NSMutableArray" key="dict.values">
<bool key="EncodedWithXMLCoder">YES</bool>
</object>
</object>
<object class="NSMutableArray" key="IBDocument.RootObjects" id="1000">
<bool key="EncodedWithXMLCoder">YES</bool>
<object class="IBProxyObject" id="372490531">
<string key="IBProxiedObjectIdentifier">IBFilesOwner</string>
<string key="targetRuntimeIdentifier">IBCocoaTouchFramework</string>
</object>
<object class="IBProxyObject" id="843779117">
<string key="IBProxiedObjectIdentifier">IBFirstResponder</string>
<string key="targetRuntimeIdentifier">IBCocoaTouchFramework</string>
</object>
<object class="IBUIView" id="774585933">
<reference key="NSNextResponder"/>
<int key="NSvFlags">274</int>
<string key="NSFrameSize">{320, 460}</string>
<reference key="NSSuperview"/>
<object class="NSColor" key="IBUIBackgroundColor">
<int key="NSColorSpace">3</int>
<bytes key="NSWhite">MC43NQA</bytes>
<object class="NSColorSpace" key="NSCustomColorSpace">
<int key="NSID">2</int>
</object>
</object>
<bool key="IBUIClearsContextBeforeDrawing">NO</bool>
<object class="IBUISimulatedStatusBarMetrics" key="IBUISimulatedStatusBarMetrics"/>
<string key="targetRuntimeIdentifier">IBCocoaTouchFramework</string>
</object>
</object>
<object class="IBObjectContainer" key="IBDocument.Objects">
<object class="NSMutableArray" key="connectionRecords">
<bool key="EncodedWithXMLCoder">YES</bool>
<object class="IBConnectionRecord">
<object class="IBCocoaTouchOutletConnection" key="connection">
<string key="label">view</string>
<reference key="source" ref="372490531"/>
<reference key="destination" ref="774585933"/>
</object>
<int key="connectionID">7</int>
</object>
</object>
<object class="IBMutableOrderedSet" key="objectRecords">
<object class="NSArray" key="orderedObjects">
<bool key="EncodedWithXMLCoder">YES</bool>
<object class="IBObjectRecord">
<int key="objectID">0</int>
<reference key="object" ref="0"/>
<reference key="children" ref="1000"/>
<nil key="parent"/>
</object>
<object class="IBObjectRecord">
<int key="objectID">-1</int>
<reference key="object" ref="372490531"/>
<reference key="parent" ref="0"/>
<string key="objectName">File's Owner</string>
</object>
<object class="IBObjectRecord">
<int key="objectID">-2</int>
<reference key="object" ref="843779117"/>
<reference key="parent" ref="0"/>
</object>
<object class="IBObjectRecord">
<int key="objectID">6</int>
<reference key="object" ref="774585933"/>
<reference key="parent" ref="0"/>
</object>
</object>
</object>
<object class="NSMutableDictionary" key="flattenedProperties">
<bool key="EncodedWithXMLCoder">YES</bool>
<object class="NSArray" key="dict.sortedKeys">
<bool key="EncodedWithXMLCoder">YES</bool>
<string>-1.CustomClassName</string>
<string>-2.CustomClassName</string>
<string>6.IBEditorWindowLastContentRect</string>
<string>6.IBPluginDependency</string>
</object>
<object class="NSMutableArray" key="dict.values">
<bool key="EncodedWithXMLCoder">YES</bool>
<string>UntitledViewController</string>
<string>UIResponder</string>
<string>{{239, 654}, {320, 480}}</string>
<string>com.apple.InterfaceBuilder.IBCocoaTouchPlugin</string>
</object>
</object>
<object class="NSMutableDictionary" key="unlocalizedProperties">
<bool key="EncodedWithXMLCoder">YES</bool>
<reference key="dict.sortedKeys" ref="0"/>
<object class="NSMutableArray" key="dict.values">
<bool key="EncodedWithXMLCoder">YES</bool>
</object>
</object>
<nil key="activeLocalization"/>
<object class="NSMutableDictionary" key="localizations">
<bool key="EncodedWithXMLCoder">YES</bool>
<reference key="dict.sortedKeys" ref="0"/>
<object class="NSMutableArray" key="dict.values">
<bool key="EncodedWithXMLCoder">YES</bool>
</object>
</object>
<nil key="sourceID"/>
<int key="maxID">7</int>
</object>
<object class="IBClassDescriber" key="IBDocument.Classes">
<object class="NSMutableArray" key="referencedPartialClassDescriptions">
<bool key="EncodedWithXMLCoder">YES</bool>
<object class="IBPartialClassDescription">
<string key="className">UntitledViewController</string>
<string key="superclassName">UIViewController</string>
<object class="IBClassDescriptionSource" key="sourceIdentifier">
<string key="majorKey">IBProjectSource</string>
<string key="minorKey">Classes/UntitledViewController.h</string>
</object>
</object>
</object>
</object>
<int key="IBDocument.localizationMode">0</int>
<string key="IBDocument.TargetRuntimeIdentifier">IBCocoaTouchFramework</string>
<object class="NSMutableDictionary" key="IBDocument.PluginDeclaredDevelopmentDependencies">
<string key="NS.key.0">com.apple.InterfaceBuilder.CocoaTouchPlugin.InterfaceBuilder3</string>
<integer value="3100" key="NS.object.0"/>
</object>
<bool key="IBDocument.PluginDeclaredDependenciesTrackSystemTargetVersion">YES</bool>
<string key="IBDocument.LastKnownRelativeProjectPath">Untitled.xcodeproj</string>
<int key="IBDocument.defaultPropertyAccessControl">3</int>
<string key="IBCocoaTouchPluginVersion">77</string>
<nil key="IBCocoaTouchSimulationTargetRuntimeIdentifier"/>
</data>
</archive>

执行转换后的源代码如下：

UIView *view6 = [[UIView alloc] initWithFrame:CGRectMake(0.0, 0.0, 320.0, 460.0)];
view6.frame = CGRectMake(0.0, 0.0, 320.0, 460.0);
view6.alpha = 1.000;
view6.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
view6.backgroundColor = [UIColor colorWithWhite:0.750 alpha:1.000];
view6.clearsContextBeforeDrawing = NO;
view6.clipsToBounds = NO;
view6.contentMode = UIViewContentModeScaleToFill;
view6.hidden = NO;
view6.multipleTouchEnabled = NO;
view6.opaque = YES;
view6.tag = 0;
view6.userInteractionEnabled = YES;

从试验的结果看，只能转换VIEW（包括UIVIEW的子类）相关的东西，而且控件和其对应事件的联系丢失。

而且转换后所有的属性的设置都会生成相应的Objective-C代码，不论是否属性值本身是缺省的。