StackOverflow2013

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copied!<p>There are two things that I am aware of:</p> <p>1) Files that are generated by your app (and not a result of the user using your app) such as temporary text files to store a variable's value, then these files must be placed in the Library/Cache instead of the Document directory.</p> <p>2) You must also mark a file with a "skip-backup" attribute to tell iCloud not to backup the file.</p> <p>I think you might be missing step 2.</p> <p>I wrote a simple MediaDirectory class which quickly gives me the path to the files in the Library/Cache folder and also add the skip backup attribute. </p> <p>After you saved your file to the Libary/Cache folder, you simply go something like this:</p> <pre><code>[MediaDirectory addSkipBackupAttributeForFile:@"myTextFile.txt"]; </code></pre> <p>Here's the class in full:</p> <pre><code>// Header File // ---------------------------------------------------------------------- // This class takes a file name (including extension) and returns // the path to that file in the Library/Cache folder // ---------------------------------------------------------------------- #import <Foundation/Foundation.h> @interface MediaDirectory : NSObject +(NSString *) mediaPathForFileName:(NSString *) fileName; +(NSString *) mediaPathForFileName:(NSString *) fileName inSubDirectory:(NSString *) subDirectory; + (BOOL)addSkipBackupAttributeToFile:(NSString *) fileName; + (BOOL)addSkipBackupAttributeToFile:(NSString *) fileName inSubDirectory:(NSString *) subDirectory; @end // Implementation File #import "MediaDirectory.h" #include <sys/xattr.h> @implementation MediaDirectory +(NSString *) mediaPathForFileName:(NSString *) fileName { NSArray *directoryPaths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES); NSString *cachesDirectory = [directoryPaths objectAtIndex:0]; NSString *filePath = [NSString stringWithFormat:@"%@/%@", cachesDirectory, fileName]; return filePath; } // if an image needs to be stored in a sub folder called "images" +(NSString *) mediaPathForFileName:(NSString *) fileName inSubDirectory:(NSString *) subDirectory { NSArray *directoryPaths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES); NSString *cachesDirectory = [directoryPaths objectAtIndex:0]; NSString *filePath = [NSString stringWithFormat:@"%@/%@/%@", cachesDirectory, subDirectory, fileName]; return filePath; } //+ (BOOL)addSkipBackupAttributeToItemAtURL:(NSURL *)URL + (BOOL)addSkipBackupAttributeToFile:(NSString *) fileName { const char* filePath = [[self mediaPathForFileName:fileName] fileSystemRepresentation]; const char* attrName = "com.apple.MobileBackup"; u_int8_t attrValue = 1; int result = setxattr(filePath, attrName, &attrValue, sizeof(attrValue), 0, 0); return result == 0; } + (BOOL)addSkipBackupAttributeToFile:(NSString *) fileName inSubDirectory:(NSString *) subDirectory { const char* filePath = [[self mediaPathForFileName:fileName inSubDirectory:subDirectory] fileSystemRepresentation]; const char* attrName = "com.apple.MobileBackup"; u_int8_t attrValue = 1; int result = setxattr(filePath, attrName, &attrValue, sizeof(attrValue), 0, 0); return result == 0; } @end </code></pre>

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