Convert UIImage to NSData and convert back to UIImage in Swift?
UIImage(data:imageData,scale:1.0) presuming the image’s scale is 1. In swift 4.2, use below code for get Data(). image.pngData()
nsdata
convert UIImage to NSData
Try one of the following, depending on your image format: UIImageJPEGRepresentation Returns the data for the specified image in JPEG format. NSData * UIImageJPEGRepresentation ( UIImage *image, CGFloat compressionQuality ); UIImagePNGRepresentation Returns the data for the specified image in PNG format NSData * UIImagePNGRepresentation ( UIImage *image ); Here the docs. EDIT: if you want … Read more
How to initialise a string from NSData in Swift
This is the implemented code needed: in Swift 3.0: var dataString = String(data: fooData, encoding: String.Encoding.utf8) or just var dataString = String(data: fooData, encoding: .utf8) Older swift version: in Swift 2.0: import Foundation var dataString = String(data: fooData, encoding: NSUTF8StringEncoding) in Swift 1.0: var dataString = NSString(data: fooData, encoding:NSUTF8StringEncoding)
Creating NSData from NSString in Swift
In Swift 3 let data = string.data(using: .utf8) In Swift 2 (or if you already have a NSString instance) let data = string.dataUsingEncoding(NSUTF8StringEncoding) In Swift 1 (or if you have a swift String): let data = (string as NSString).dataUsingEncoding(NSUTF8StringEncoding) Also note that data is an Optional<NSData> (since the conversion might fail), so you’ll need to … Read more
How can I convert my device token (NSData) into an NSString?
If anyone is looking for a way to do this in Swift: Swift 3 introduces the Data type, with value semantics. To convert the deviceToken to a String, you can do as follows: func application(_ application: UIApplication, didRegisterForRemoteNotificationsWithDeviceToken deviceToken: Data) { let token = deviceToken.map { String(format: “%02.2hhx”, $0) }.joined() print(token) } Old answer using … Read more
Convert between UIImage and Base64 string
Swift First we need to have image’s NSData //Use image name from bundle to create NSData let image : UIImage = UIImage(named:”imageNameHere”)! //Now use image to create into NSData format let imageData:NSData = UIImagePNGRepresentation(image)! //OR next possibility //Use image’s path to create NSData let url:NSURL = NSURL(string : “urlHere”)! //Now use image to create into … Read more
Convert UTF-8 encoded NSData to NSString
If the data is not null-terminated, you should use -initWithData:encoding: NSString* newStr = [[NSString alloc] initWithData:theData encoding:NSUTF8StringEncoding]; If the data is null-terminated, you should instead use -stringWithUTF8String: to avoid the extra \0 at the end. NSString* newStr = [NSString stringWithUTF8String:[theData bytes]]; (Note that if the input is not properly UTF-8-encoded, you will get nil.) Swift … Read more
How do I convert an NSString value to NSData?
NSString* str = @”teststring”; NSData* data = [str dataUsingEncoding:NSUTF8StringEncoding];