Download e-book for kindle: Windows Phone 8 Development Internals by Andrew Whitechapel

By Andrew Whitechapel

ISBN-10: 0735676232

ISBN-13: 9780735676237

Drill into home windows cellphone eight layout and structure - and examine most sensible practices for construction various functions. Led through senior contributors of the center home windows mobile Developer Platform group, you are going to study the underlying know-how to help you construct greater apps. every one bankruptcy specializes in a unmarried home windows telephone development block or characteristic zone and exhibits you the way to use it on your functions - delivering you priceless insights into the home windows cellphone platform layout and API floor.

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Both of these are called more often than you might expect and are not intended for state management operations. State property is an IDictionary object that the OS saves. All you have to do is write to the collection (or read from it) at any time during execution, or in the appropriate event handler. This dictionary is not persisted across separate instances of the app; that is, across fresh launches from the Start page, and so on. The LifecycleState solution in the sample code demonstrates the behavior, as demonstrated in Figure 2-10.

This navigates first to the default page in the app. The user then navigates to page 2 within the app. this is the second navigation. Then, the user taps the Start button. This navigates to the default page in the Start app. From there, the user launches a second app, which navigates to the default page in that second app. info Pressing the Back button from the initial page of the second app takes the user back to the Start app. Pressing Back again takes her back to page 2 in the first app. She would continue to navigate backward within the in-app page backstack until she arrives at the initial page in the first app.

However, you can remove entries from the backstack—up to and including all entries—such that navigating back no longer necessarily takes the user back to the immediately preceding page. Note The ability to manipulate the backstack is a powerful one that affords you a lot of flexibility, but it also gives you a way to break conformance with the Windows Phone app model. You should use this only after very careful consideration, and only if you’re sure you can’t avoid it.. Figure 2-13 shows the NavigationManagement solution in the sample code, which illustrates how you can manipulate the backstack.

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Windows Phone 8 Development Internals by Andrew Whitechapel

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