ios file manager

1. iOS sandbox mechanismiOS apps can only read files in the file system created for the program, and not be able to go anywhere else, this area is a sandbox, so all non-code files are saved in this, image, icon, sound, images, attribute list, text file, etc.1.1. Each application has its own storage space1.2, the application can not turn over their walls to access

[IOS development-101] solution: The file * couldn't be opened because you don't have permission to view it, ios-101 (1) The error message "The file * couldn't be opened because you don't have permission to view it" appears for no reason. Solution: Window> Organizer> select your project name on the left of the box b

IOS-json File Analysis Methods: ios-json1. Engineering Drawing. Ii. Code. # Import "ViewController. h" # Import "SBJson. h" @ Interface ViewController () @ End @ Implementation ViewController -(Void) viewDidLoad { [Super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. // The first JSON parsing method is the built-in JSON

1. iOS sandbox mechanismiOS applications can only read files in the file system created for the program, not access to other places, this area is a sandbox, so all non-code files to be stored in this, such as icons, sounds, images, attributes list, text files and so on.1.1. Each application has its own storage space1.2, the application can not turn over their walls to access the contents of other storage sp

NextIOS sandbox mechanism and file operations for iOS Learning (1) Let's see how to get the sandbox directory of the application. Including the sandbox directory of the real machine. 1. Get the Home Directory of the program NSString *homeDirectory = NSHomeDirectory(); NSLog(@"path:%@", homeDirectory); Print result: 2012-06-17 14:00:06.098 IosSandbox[3536:f803] /Users/rongfzh/Library/Application

//create File Manager nsfilemanager *filemanager = [Nsfilemanager Defaultmanager]; Nsarray *paths = Nssearchpathfordirectoriesindomains (NSDocumentDirectory, Nsuserdomainmask, YES); NSString *documentsdirectory = [Paths objectatindex:0]; Change to the directory under Operation [FileManager Changecurrentdirectorypath:[documentsdirectory Stringbyexpandingtildeinpath]; Create

1. iOS sandbox mechanismiOS applications can only read files in the file system created for the program, not access to other places, this area is a sandbox, so all non-code files to be stored in this, such as icons, sounds, images, attributes list, text files and so on.1.1. Each application has its own storage space1.2, the application can not turn over their walls to access the contents of other storage sp

1.Create A. pch file.2.Write your macro, headfiles or something. Here is my prefixheader.pch3.Choose the Project and select "Build Settings">>> Find with keywords "prefix">>>make the "precompile Prefix Header" is "Yes".4.Tell Xcode where has you put your. pch file. Select "Prefix Header", Double click the contentand write "$ (srcroot)/magicnote/prefixheader.pch"or "$ (project_dir)/your PROJECT name/your

The project has a download file function, download needs to be able to view, can not be for each type of file to write a view function bar. The good news is that iOS has a uidocumentinteractioncontroller that can help you tune up the installed apps on your phone to see the files. First, configure the Info.plist file t

IOS-Plist file storage (1), iosplist File 1. What is a file system? In IOS, each app has its own file system and corresponding access permissions, which are generally divided ~ /Documents/ ~ /Tmp/ ~ /Library/Caches/ ~ /Library/Pr

http://blog.csdn.net/jinnchang/article/details/448281891. Introduction of sandbox mechanismThe sandbox mechanism (sandbox) in IOS is a security system.Each IOS application has a separate file system (storage space) and can only operate on the corresponding file system, which is called a sandbox. All non-code files are

contains a comma character, which must be enclosed in double quotation marks. (The 6 ) field contains a newline character, which must be enclosed in double quotation marks. (7 ) contains spaces before and after the field, which must be enclosed in double quotation marks. (a b C ==> "a b C" ) (8 ) The double quotation marks in the field, expressed in two double quotation marks. (I said: "abc" .) ==> I said: abc. ) (9 ) if there are double quotes in the field, the field must be enclosed in

This article see the introduction of http://www.uml.org.cn/mobiledev/201209211.asp#1 in this article, respect for the original. 1. iOS sandbox Mechanism IOS applications can only read files from the file system created in this application. They cannot be accessed from other places. This area is a sandbox, all non-code files must be stored here, such as icons, s

a document to an external application. What is the other-the-round–importing a document into your application? In IOS, there is, ways to get files into your application: File sharing through ITunes Through exchanges between applications (like the one-you-just saw in the previous section) Let ' s discuss the first method first. The first method presents a very easy and di

In this article, in the previous iOS development of the network programming-using Nsurlconnection to achieve large file breakpoint continuation download, the use of output stream instead of file handle to achieve large file breakpoint continuation.In the actual development, the input and output flow with less, but it i

We know that you can use the Prefix. pch file in the IOS project to perform some pre-compilation operations, such as introducing global header files and defining constants. I encountered an incredible problem when I was preparing to write a Demo today. No matter how I did it, introducing the header file in the pch file

First, we will summarize how to obtain the documents directory. In iOS development, we often need to retrieve the complete path of the documents directory for reading and writing files. I have summarized the following two methods: 1. nsstring * documentsdirectory = [nshomedirectory () stringbyappendingpathcomponent: @ "documents"]; 2. nsarray * paths = nssearchpathfordirectoriesindomains (nsdocumentdirectory, nsuserdomainmask, yes ); Nsstring *

nsdictionary *fileattributes = [[Nsfilemanager Defaultmanager] Fileattributesatpath:path TraverseLink:YES];unsigned long long length = [FileAttributes fileSize];float ff = length/1024.0/1024.0;NSLog (@ "length==%.2f", ff);---------------------if ([[[Nsfilemanager Defaultmanager] Fileexistsatpath:path]) {//Delete if it exists[[Nsfilemanager Defaultmanager] Removeitematpath:path Error:nil]; }IOS get file

When mobile devices such as mobile phones and tablets become the necessities in people's life, how to connect computers with mobile devices easily and realize file sharing becomes an urgent problem. The file transfer feature software is numerous, but the quick completion of this operation on Apple devices is about the new WiFi file transfer feature in the