.a静态库合并

静态库是.o文件的合集, 静态库合并就是将静态库的.o合并, 可以实现的工具

• ar, 静态库的查看、拆分、合并
• libtool, xcode提供的静态库操作工具

以libtool演示.a静态库合并

一、准备

1. 在staticLib文件夹里准备好两个.a静态库

2. 目录结构

    .
    ├── libAFNetworking.a
    └── libSDWebImage.a
   

二、合并

1. 执行命令

    libtool \
    -static \
    -o \
    libMerge.a \
    libAFNetworking.a \
    libSDWebImage.a
   

   • 参数说明

     • libMerge.a是合并后生成静态库的名称
     • libAFNetworking.a和libSDWebImage.a是将要被合并的两个静态库

   • 生成最终静态库

       .
       ├── libAFNetworking.a
       ├── libMerge.a
       └── libSDWebImage.a
     

2. 利用ar来验证下静态库文件是否包含两个静态库的.o文件

    ar -t /Users/shenyj/Documents/CodeForTest/staticLibMerge/staticLib/libMerge.a
   

   输出结果

    ❯ ar -t /Users/shenyj/Documents/CodeForTest/staticLibMerge/staticLib/libMerge.a
    __.SYMDEF
    AFHTTPSessionManager.o
    AFNetworking-dummy.o
    AFNetworkReachabilityManager.o
    AFSecurityPolicy.o
    AFURLRequestSerialization.o
    AFURLResponseSerialization.o
    AFURLSessionManager.o
    NSBezierPath+SDRoundedCorners.o
    NSButton+WebCache.o
    NSData+ImageContentType.o
    NSImage+Compatibility.o
    SDAnimatedImage.o
    SDAnimatedImagePlayer.o
    SDAnimatedImageRep.o
    SDAnimatedImageView+WebCache.o
    SDAnimatedImageView.o
    SDAssociatedObject.o
    SDAsyncBlockOperation.o
    SDDeviceHelper.o
    SDDiskCache.o
    SDDisplayLink.o
    SDFileAttributeHelper.o
    SDGraphicsImageRenderer.o
    SDImageAPNGCoder.o
    SDImageAssetManager.o
    SDImageAWebPCoder.o
    SDImageCache.o
    SDImageCacheConfig.o
    SDImageCacheDefine.o
    SDImageCachesManager.o
    SDImageCachesManagerOperation.o
    SDImageCoder.o
    SDImageCoderHelper.o
    SDImageCodersManager.o
    SDImageFrame.o
    SDImageGIFCoder.o
    SDImageGraphics.o
    SDImageHEICCoder.o
    SDImageIOAnimatedCoder.o
    SDImageIOCoder.o
    SDImageLoader.o
    SDImageLoadersManager.o
    SDImageTransformer.o
    SDInternalMacros.o
    SDMemoryCache.o
    SDWeakProxy.o
    SDWebImage-dummy.o
    SDWebImageCacheKeyFilter.o
    SDWebImageCacheSerializer.o
    SDWebImageCompat.o
    SDWebImageDefine.o
    SDWebImageDownloader.o
    SDWebImageDownloaderConfig.o
    SDWebImageDownloaderDecryptor.o
    SDWebImageDownloaderOperation.o
    SDWebImageDownloaderRequestModifier.o
    SDWebImageDownloaderResponseModifier.o
    SDWebImageError.o
    SDWebImageIndicator.o
    SDWebImageManager.o
    SDWebImageOperation.o
    SDWebImageOptionsProcessor.o
    SDWebImagePrefetcher.o
    SDWebImageTransition.o
    UIButton+WebCache.o
    UIColor+SDHexString.o
    UIImage+ExtendedCacheData.o
    UIImage+ForceDecode.o
    UIImage+GIF.o
    UIImage+MemoryCacheCost.o
    UIImage+Metadata.o
    UIImage+MultiFormat.o
    UIImage+Transform.o
    UIImageView+HighlightedWebCache.o
    UIImageView+WebCache.o
    UIView+WebCache.o
    UIView+WebCacheOperation.o
   

以ar演示.a静态库合并

1. 准备两个.a静态库: libAFNetworking.a和libSDWebImage.a

    .
    ├── libAFNetworking.a
    └── libSDWebImage.a
   

2. 先将.a展开成.o文件, 利用x参数

   • 展开AFNetworking

       ar x /Users/shenyj/Documents/CodeForTest/lib/staticLibMerge/staticLib/libAFNetworking.a
     

   • 展开SDWebImage

       ar x /Users/shenyj/Documents/CodeForTest/lib/staticLibMerge/staticLib/libSDWebImage.a
     

3. 利用ar合并

    ar -rc libMerge.a *.o
   

   生成新的.a静态库: libMerge.a

4. 验证下合并是否成功

    ar -t /Users/shenyj/Documents/CodeForTest/lib/staticLibMerge/staticLib/libMerge.a
   

   会显示两个静态库的全部.o文件