我需要在RubyMotion中下载和解压缩文件。我尝试寻找示例,但找不到任何此过程。
我有一个变量(@file),它是请求中的所有数据。我需要将该数据写入文件然后解压缩,保留未压缩的数据并删除tmp压缩文件。
这是我到目前为止所做的:
class LoadResourcesViewController < UIViewController
def viewDidAppear(animated)
@loading_bar = retrieve_subview_with_tag(self, 1)
req=NSURLRequest.requestWithURL(NSURL.URLWithString("#{someurl}"))
@connection = NSURLConnection.alloc.initWithRequest req, delegate: self, startImmediately: true
end
def connection(connection, didFailWithError:error)
p error
end
def connection(connection, didReceiveResponse:response)
@file = NSMutableData.data
@response = response
@download_size = response.expectedContentLength
end
def connection(connection, didReceiveData:data)
@file.appendData data
@loading_bar.setProgress(@file.length.to_f/@download_size.to_f)
end
def connectionDidFinishLoading(connection)
#create tmp file
#uncompress .tar, .tar.gz or .zip
#presist uncompresssed files and delete original tmp file
puts @file.inspect
@connection.release
solutionStoryboard = UIStoryboard.storyboardWithName("Master", bundle:nil)
myVC = solutionStoryboard.instantiateViewControllerWithIdentifier("Main3")
self.presentModalViewController(myVC, animated:true)
end
end
任何帮助或示例都会很棒!
答案 0 :(得分:3)
所以我解决了这个问题,解压缩和解开。
解压缩:
#UNZIP given you have a var data that contains the zipped up data.
tmpFilePath = "#{NSTemporaryDirectory()}temp.zip" #Get a temp dir and suggest the filename temp.zip
@fileManager = NSFileManager.defaultManager() #Get a filemanager instance
@fileManager.createFileAtPath(tmpFilePath, contents: data, attributes:nil) #Create the file in a temp directory with the data from the "data" var.
destinationPath = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, true ).objectAtIndex(0) //get the target home for the unzipped files. This MUST be within your domain in order to persist.
SSZipArchive.unzipFileAtPath(tmpFilePath, toDestination: destinationPath) #Use the SSZipArchive to unzip the file.
@fileManager.removeItemAtPath(tmpFilePath, error: nil) #Cleanup the tmp dir/files
请记住,您必须包含SSZipArchive lib。我使用了obj-c lib而不是cocoapod。为此,在Rakefile中添加以下行(假设您将obj-c文件放在vendor / SSZipArchive文件夹中):
app.libs += ['/usr/lib/libz.dylib']
app.vendor_project('vendor/SSZipArchive', :static)
To Untar:
dir = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask, true) #get target dir for untar'd files
error_ptr = Pointer.new(:object)
NSFileManager.defaultManager.createFilesAndDirectoriesAtPath(dir[0], withTarData: data, error: error_ptr) #Create and untar te data (assumes you have collected some tar'd data in the data var)
在这种情况下,您将需要Light Untar lib(https://github.com/mhausherr/Light-Untar-for-iOS/)。要包含此lib,请将以下内容添加到Rakefile中(假设文件位于vendor / unTar中):
app.vendor_project('vendor', :static, :headers_dir=>"unTar")