nsdata

Evening, I'm trying to creating an APIClient, but I'm having a problem with a warning : APIClient.swift:53:81: Cast from 'Data' to unrelated type '[String : Any]' always fails In this code I'm trying to convert Data into JSON as a dictionary [String : Any] . I guess the compiler can't know if this cast could or could not be possible so it throws the error, but I'm pretty sure it will work. So how can I avoid this warning or how can I write safer code? case 200: do { let json = try JSONSerialization.data(withJSONObject: data!, options: []) as? [String : Any] completion(json, HTTPResponse, nil)

Possible Duplicates: How to convert NSArray to NSData? Need to convert NSData to NSArray HI, I have a NSData object named as "myNsData"(it is converted form of NSArray) and a NSarray named as "myNsArray. can any one provide me a code to convert a NSData to NSArray? Simon Lee See this post... Convert NSArray to NSData The last comment deals with the reverse.... NSArray *array = [NSKeyedUnarchiver unarchiveObjectWithData:data] I am not sure but can you try NSArray *myNsArray = [NSKeyedUnarchiver unarchiveObjectWithData:myNsData]; 来源： https://stackoverflow.com/questions/6108924/how-can-i-convert

I have an ics (Calendar) file that I'm opening with a UIDocumentInteractionController , using presentOptionsMenuFromRect: . When this runs, the "Open In" menu looks like this . As you can see, no "Add to Calendar" option. Here's what gets me: I'm using the same exact code for a .vcf (contact card) file, and it works as expected with the "Open In Contacts" option available. Am I missing some sort of permission in my Info.plist for calendar access? Why can't UIDocumentInteractionController handle the .ics file type correctly, but .vcf works just fine? Those two file types are very similar. From

Here is a Java code, which computes SHA512 hash of a byte array with salt: private static String DIGEST_ALGORITHM = "SHA-512"; public static byte[] getHash(final byte[] data, final byte[] salt) throws NoSuchAlgorithmException { final MessageDigest md = MessageDigest.getInstance(DIGEST_ALGORITHM); md.reset(); if (salt != null) { md.update(salt); } return md.digest(data); In Objective C, I use this algorithm for compute the hash of an NSData: @implementation NSData (CommonDigest) - (NSData *) SHA512Hash { unsigned char hash[CC_SHA512_DIGEST_LENGTH]; (void) CC_SHA512( [self bytes], (CC_LONG)[self

What is the difference between + (instancetype)dataWithBytes:(const void *)bytes length:(NSUInteger)length; and + (instancetype)dataWithBytesNoCopy:(void *)bytes length:(NSUInteger)length; Also, + (instancetype)dataWithBytesNoCopy:(void *)bytes length:(NSUInteger)length freeWhenDone:(BOOL)b; if b == YES , will it free the bytes automatically after converted to data? I am working on an app and almost finished it. But the last problem is it crashes with memory error when it runs on device. It only crashes when on device, but in simulator it is perfect. "malloc: * error for object 0x17415d0c0: