@property (nonatomic, kopiera, skrivskyddad) NSString * titel, * artist, * genre, * coverUrl, * år; – (Id) initWithTitle: (NSString *) titel artist: (NSString *) artist. NFC Tools is an app which allows you to read, write and program tasks on your NFC tags and other RFID compatible chips. All you need to do is get your device . Re-use/recycle write protected NFC Tags such as hotel key-cards, access badges, price tags, lift cards, key fobs etc You can use this app to associate multiple.

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But the protocol definition is below the class definition and so is not visible at this point.

iOS designmönster

You don’t want to mix view logic with communication logic. Don’t despair, you’ll learn how to kopierra this using the Observer pattern: The last album you viewed won’t be the default album when the app launches.

Add the following code to HorizontalScroller. So add the following protocol methods:.

Now, when the app is about to enter the background, the ViewController will automatically save the current state by calling saveCurrentState. Since there’s an action in the undo stack, you need to enable the undo button. The compiler will ignore this line but if you drop down the list of methods in your current file via Xcode’s jump bar, you’ll see a separator and a bold title for the directive.

For the most tech-savvy of you, the geeks: This creates a toolbar which will display the buttons for the new actions, as well as an array to act as the command queue.

Now that HorizontalScroller is complete, it’s time to use it in your app. Add the following signature or method prototype to PersistencyManager. BlueLibrary-final There are two other design patterns that didn’t make their way into the app, but are important to mention: This adds selfwhich is the current class, as an observer for the image property of coverImage. Later on, this externalized state can be restored without violating encapsulation; that is, private data remains private.


This is a great way to make sure the app experience remains personal and resumable. The HorizontalScroller asks its delegate for the views one at a time and it lays them next to each another horizontally with the previously defined padding. Build and run your project and take a look at your awesome new horizontal scroller: To do this, add the following code above the interface line: Singleton och Abstract Factory.

iOS designmönster –

In KVO, an object can ask to be notified of any changes to a specific property; either its own or that of another object. It decouples the sending object from the receiving object or objects and can persist a request or a chain of requests. The view’s dimensions inside the scroller will be x with a 10 point margin from its enclosing rectangle. When the state changes, all the observing objects are notified of the change.

Re: [sv-users] Calc – tabell / tabellmall

Quite practical, isn’t it? This method loads album data via LibraryAPI and then sets the currently displayed view based on the current value of the current view index. If another developer looks at your code, they’ll instantly understand what’s going on and kopjera each class does in your app.

Required methods must be implemented by the delegate and usually contain some data that is absolutely required by the class.

[sv-users] Calc – tabell / tabellmall – The Document Foundation Mailing List Archives

There’s one more thing to do. NFC Tools wakdev Verktyg. Relaunch, and check that the previously selected album is centered:.

When the view is found, send the delegate the horizontalScroller: Other sktivskyddad are available under the “Other” tab, such as copying, erasing and password protecting your NFC tag. It would probably be a good idea to save the downloaded covers locally so the app won’t need to download the same covers over and over again. Cocoa implements the skrivskydddad pattern in two familiar ways: Real data storage, Bluetooth pairing via Tap to launch; launch applications. When this class is deallocated, it removes itself as an observer from all notifications it had registered for.


Now, add the method implementation to PersistencyManager. To do this, you’ll need to perform some calculations when the user skrivskydadd the scroll view with their finger. Instead, be aware of design patterns when you consider how to solve a particular problem, especially in the early stages of designing your app.

How would you save the Album data to a file? If it doesn’t exist, it creates the album data and immediately saves it for the next launch of the app. Browse through the code you’ve just written; you’ll see there’s not one single mention of the Album or AlbumView classes.

Account Options Logga in. This way, when an image is loaded, the spinner will stop spinning. They’ll make your life as a developer much easier and your code a lot better! It looks like the album data is correct, but the scroller isn’t centered on the correct album. You’ll also want to save the album data every time the app goes into the background.

We work hard to provide you with a quality app, but you may run into problems we couldn’t anticipate. Now add the following method to LibraryAPI.

Also, note that the toolbar isn’t initiated with a frame, as the frame size set in viewDidLoad isn’t final. Sounds like a conundrum? NFC A – its serial number ex: Add the following code to the end of saveCurrentState in ViewController.

Enkla och intuitiva, NFC verktyg kan spela standardinformation om dina taggar som kommer att vara kompatibel med alla NFC-enhet.