Archiverootobject overwrite a file

Minor improvements[ edit ] As a general rule, use the link "Upload a new version of this file" only for relatively minor improvements. Examples include replacement with higher resolution versions of the same file minor and uncontroversial color correction, noise reduction, perspective correction etc. This might include a minor crop, for example to remove a recently-added border don't upload over with files that remove parts of historical imagesbut aggressive crops should usually be uploaded under a new name, such as "Old image name crop.

Archiverootobject overwrite a file

September 15, Author: This is the sort of thing no one tells you about when you are first starting out as a programmer. I then deviated into the realm of what they call persistent storage for nearly 2 months before I got the hang of it.

It was a grueling period of self doubt and defeatism which I hope to spare you from in your own search for the spring of everlasting life: The bare fact is that you only have 3 significant options for Swift persistent data storage: Core Data — Complicated to learn, and you have to build your app to accommodate it from the beginning.

But if you have the time and resolve to learn it has the greatest flexibility and performance benefits of the three methods, by a long way.

Method Documentation

Core Data is a rather arrogant persistent storage system. This is a great option for new programmers or those suddenly having to incorporate persistent storage towards the end of the app development process… Drawbacks are that it requires a lot of repetitive boilerplate code, and is worthless for multi-user or network applications.

It can store just about any kind of data you need. Two thumbs up and the star of this post. NSUserDefaults — This is the simplest form of persistent data storage and was designed with a specific use according to Apple.

You can sometimes bend it to your will for other applications, but there are better ways. For example, you can allow users to determine what units of measurement your application displays or how often documents are automatically saved.

It took me 2 months of part time google searching, stack overflowing, trial and error, frustration, and low self esteem before I cracked it. Many of the posts are written years ago, and need a lot of tweeting for modern Swift.

It also took me a long time to learn because I was having to figure out so many other basics of programming just to wrap my wits around it.

archiverootobject overwrite a file

These guys really really got me through: On the left is the code and the right is a storyboard with the View Controller for our MyViewController class. The idea is simple, we input text into the box. Restart the app and when you press LOAD our same text should pop up again, proving that we stored it successfully.

With NSKeyedArchiver, if we can accomplish persistent storage with a string, we can accomplish it with pretty much anything. The top covers our global variables. The middle is the ViewController class, and the bottom is the DataObj class which represents our database.

Lets look at the top section first: First, we create an instance of the DataObj class called dataObj.It is possible to have files, each one for a different platform. The files are named like this: A file has priority over the file. directory may contain a file named benjaminpohle.coms That file is used for localization and contains all translateable strings.

This particular type of cache is designed to totally overwrite all of its contents. Blowing it away entirely every time the app gets fresh data ensures there are fewer synchronization bugs.

archiverootobject overwrite a file

When initializing with a name, you can easily increment the version number when the . The method of NSKeyedArchiver named archiveRootObject can automatically maintain the archiver file path. In the Apple's doucumet Archives an object graph rooted at a given object by encoding it into a data object then atomically writes the resulting data object to a file at a given path, and returns a Boolean value that indicates whether the operation was successful.

May 09,  · The text view classes UITextView, UITextField and UILabel (and maybe a few others) have been extended to handle attributed strings.

Commons:Overwriting existing files - Wikimedia Commons

Great, right?. Within Xcode, Core Data lets us design our data models visually, without writing code, and stores that data model in benjaminpohle.commodeld file. Single-click benjaminpohle.commodeld file now, and you will be presented with the data model editor (see the right side of Figure ).

Ask a user not to overwrite files: To request that another editor not overwrite an existing file, you may place {{Dont overwrite}} on the user's talk page. This request is .

Swift iOS persistent data storage? The lost art of NSKeyedArchiver: Part 1 – Swift Tips