Swift 34 pdf file encoding to base64 chilkat examples. How to encode string to base64 in swift exceptionshub. Just want to point out that withunsafebytes is a throwing function and actually needs a try in front of it just fyi, its actually a rethrow function, which means that. Does anyone know how to convert a uiimage to a base64 string, and then reverse it i have the below code. The swift string class is documented in the swift standard library reference, although that doesnt cover rangeofstring because thats part of the foundation overlay for swift. Converting between image and base64 string in ios github. This means you do need to know which format is used to store the string, but utf8 is usually the best to go with. In this post ill do the opposite, putting the conversion into the context how to print an nsdata object to the debugging console. Mar 12, 20 in the previous post i wrote a few lines of code to convert an nsstring object to an nsdata object. How can we decode base64 string and convert it into pdf file and view it in ios. Swift 2 example to base64 encode and decode a string. Jun 18, 2014 i wrote base64 encode and decode routines for objectivec in the recent past.
Rfc 4648 the base16, base32, and base64 data encodings. Base64 encoding and decoding in swift encode string. Decode base64 string to pdf ios nativescript community forum. In latest release of swift, now the idea is to omitting the needless words to make it clear and significant. Nov 07, 2016 with the latest version of the swift 3. I recently found an objectivec extension on nsdata that encodes and decodes data with aes128. Fill out the form below and instructions to reset your password will be emailed to you.
How to convert a string to an nsstring free swift 5. Convert string to nsdata and nsdata to string swift. To go back the other way, from a base64 encoded nsstring object to an nsdata object is as easy as calling the method initwithbase64encodedstring, passing in. Just want to point out that withunsafebytes is a throwing function and actually needs a try in front of it just fyi, its actually a rethrow function, which means that it throws if the block you pass it throws. Thats the documentation for nsstring, not swifts string class. Writes the data objects bytes to the file specified by a given path. Working with ios file management using swift tutorial. This is the swift knowledge base, a free, searchable collection of solutions. Base64 encode and decode in swift ios developer tips. You cant just convert that pdf binary data to a string. The swift overlay to the foundation framework provides the data structure, which bridges to the nsdata class and its mutable subclass nsmutable data.
Data in swift 3 parsing a doom wad file appventure. Jul 15, 2016 swift 3 replaces nsdata with the data value type. Nonalphabet characters could exist within baseencoded data, caused by data. Demonstrates how to encode a pdf file to base64, and then decode. How can we decode base64 string and convert it into pdf file and view it in ios nsdata data. Cannot convert value of type string to type nsdata in coercion. Its a common question among ios developers, how do i convert an nsstring object to an nsdata object. What is difference between nsdata and data in swift. Let me know if you have any questions or concerns regarding ios, please put a comment here and we will get back to you asap. Encode uiimage nsdata nsstring base64encodedstring decode nsstring base64encodedstring nsdata uiimage but i get an issue when decoding a base64encodedstring to an nsdata by using the following code the following code some times converts in to a wrong nsdata, so which leads to a big issue in my project. I wrote base64 encode and decode routines for objectivec in the recent past. But while i was at it i also tried to pick the scariest most halloweenlike theme that i could find in deckset.
Encoding and decoding a string using nsdata base64. How to use data withunsafemutablebytes in swift 3 apple. I kinda just stumbled into this, its not really something that i needed to do for work or anything like that. I found answers in several places, but it does not work anymore in swift. Display base64 string into webview as pdf stack overflow. With that in mind, lets look at how to directly encode an nsdata object to base64 as well as how to decode an nsdata object from base64.
Base encodings use a specific, reduced alphabet to encode binary data. Alright, so today i wanna talk to you a little bit about parsing and working with binary data in swift. How to convert base64 data and nsdata into string stack overflow. Browse other questions tagged ios objectivec swift ios7 ios8 or ask your own question. To go back the other way, from a base64 encoded nsstring object to an nsdata object is as easy as calling the method initwithbase64encodedstring, passing in the base64 encoded nsstring lines 1415. I hope you found this blog helpful while working with ios file management using swift. Extends string class import foundation extension string func base64encoded string let plaindata datausingencodingnsutf8stringencoding let base64string plaindatabase64encodedstringwithoptionsomraw0. In fact, thats why it was base64encoded in the first place, because it was complex. This is the swift knowledge base, a free, searchable collection of solutions for common ios questions, all written for swift 5. Could someone please guide me to do this in xcode 6. When swift originally launched, nsstring older ios strings and native swift strings were completely interchangeable, as were nsarray and swift arrays, plus nsdictionary and swift dictionaries. Sep 16, 2014 swift create image instance with image name from bundle var image. Im trying to convert this objectivec code originally found in this stack overflow question which turns an nsstring into nsdata to swift. Swift create image instance with image name from bundle var image.
Objectivec language encoding and decoding a string using. How to save a pdf from a base64 string on the device with cordova. For more information about value types, see working with cocoa frameworks in using swift with cocoa and objectivec swift 4. Theres a good chance the nsstring conversions above may be more about debugging than a daytoday need to base64 encoded strings.
Yes, you have to convert it to data and then save it to the documents directory on the device. Jan 24, 2014 on line 2 we create the nsdata to encode. I believe the answer might be work in previous xcode versions and not xcode 6. How to convert nsdata to nsstring or vice versa in objective.
Base64encoding options string creates a base64 encoded string from the string using the given options. Convert a base64 string in a blob according to the data and contenttype. In the previous post i wrote a few lines of code to convert an nsstring object to an nsdata object. Hi all,in coding we have secure some information while we are sending it to server and vice versa,in this case we use encoding and decoding. This is the documentation im looking at am i looking at the right documentation set. I believe the answer might be work in previous xcode not xcode 6. Base64 encode and decode nsdata and nsstring objects. Below is a first pass i used the same test string from the original objectivec version to verify the results are as expected.
231 801 139 119 1381 1492 1180 1441 917 1341 1429 652 721 159 901 1559 150 1063 1476 1512 929 150 1157 894 1302 51 1100 598 986 503 1086