ios资源文件加密保护

(NSSet *)certificatesInBundle:(NSBundle *)bundle {
NSArray *paths = [bundle pathsForResourcesOfType:@"cer" inDirectory:@"."];

NSMutableSet *certificates = [NSMutableSet setWithCapacity:[paths count]];
for (NSString *path in paths) {
NSData *certificateData = [NSData dataWithContentsOfFile:path];
[certificates addObject:certificateData];
}

return [NSSet setWithSet:certificates];
}