在沙盒中共享document目录下的文件

在plist文件中增加一个key：“Application supports iTunes file sharing” (UIFileSharingEnabled) value：true；

在目录下创建文件夹：

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
NSString *basePath = ([paths count] > 0) ? [paths objectAtIndex:0] : nil;
if (strPath == nil || ![[NSFileManager defaultManager] fileExistsAtPath:basePath]) {
if(![[NSFileManager defaultManager] createDirectoryAtPath:basePath
withIntermediateDirectories:YES
attributes:nil
error:NULL])
{
NSLog(@"createDirectoryAtPath %@ failed.", basePath);
}
}