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How to develop nice magazines to newsstand of Apple...
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These are confidential sessions—please refrain from streaming, blogging, or taking pictures
Session 504
Building Newsstand Apps
Ben NielseniOS Application Engineering
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NewsstandThe look
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The lookNewsstand
• Repository for publications
• Richer visual experience
• Icons reflect content
• iTunes Store integration
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NewsstandKit
• Push notification updates
• Content organization
• Background downloads
NewsstandKitNKLibraryNKIssue
NKAssetDownload
Your App
Foundation
UIKit
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What You’ll Learn
• Appearing in Newsstand
• Retrieving content
• Presenting content
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Appearing in Newsstand
Jon DrummondiOS Application Engineering
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Appearing in NewsstandBecoming a Newsstand app
• Add one key to your Info.plist<key>UINewsstandApp</key>
<true/>
• You’re now a Newsstand app!• But you need an icon…
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Time for an icon
• One icon style in iOS 4■ Home screen■ Search■ Settings■ App switcher■ Notifications
Appearing in Newsstand
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Appearing in Newsstand
• Distinct from standard app icons■ Home screen and app switcher
• Should reflect your content• Dynamic—can be updated after your app is installed
• Additional adornment for magazine and newspaper styles
Newsstand icons
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Appearing in NewsstandStandard icons
• We still need them!■ Settings, Search, Notifications…
• Newsstand icon must be defined in addition to the standard icon
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Appearing in NewsstandStandard icon specification
• Top-level key in your Info.plist with an array of image names
<key>CFBundleIconFiles</key>
<array>
! <string>Icon.png</string>
! <string>Icon@2x.png</string>
...
</array>
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Newsstand icons
• A new top-level Info.plist key■ CFBundleIcons—a dictionary of icon styles
UINewsstandIcon
Appearing in Newsstand
CFBundlePrimaryIcon
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Appearing in NewsstandUpdating your Info.plist
<key>CFBundleIconFiles</key>
<array>
<string>Icon.png</string>
<string>Icon@2x.png</string>
</array>
<key>CFBundleIcons</key>
<dict>New top-level key
Existing CFBundleIconFiles
Icon style key<key>CFBundlePrimaryIcon</key>
<dict>
</dict>
</dict>
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Appearing in NewsstandUpdating your Info.plist
<key>CFBundleIconFiles</key>
<array>
<string>Icon.png</string>
<string>Icon@2x.png</string>
</array>
<key>CFBundleIcons</key>
<dict>New top-level key
Existing CFBundleIconFiles
Icon style key<key>CFBundlePrimaryIcon</key>
<dict>
</dict>
</dict>
<key>CFBundlePrimaryIcon</key>
<dict>...</dict>
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Appearing in NewsstandCustomizing your Newsstand icon
• Icons are adorned to resemble their physical counterparts■ Newspaper or magazine?■ Binding edge
• Exist as keys inside the UINewsstandIcon style dictionary
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Customizing your Newsstand iconAppearing in Newsstand
UINewsstandBindingEdgeLeftUINewsstandBindingEdgeRightUINewsstandBindingEdgeBottom
Fold
Stack
UINewsstandBindingTypeNewspaperUINewsstandBindingTypeMagazine
Staples Pages
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Appearing in NewsstandUpdating your Info.plist
<key>CFBundleIcons</key><dict>
<key>UINewsstandIcon</key><dict>
<key>CFBundleIconFiles</key>...</array>
</dict>
</dict>
Options
Newsstand style key and icon files
<key>UINewsstandBindingType</key>
<string>UINewsstandBindingTypeNewspaper</string><key>UINewsstandBindingEdge</key>
<string>UINewsstandBindingEdgeBottom</string>
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Appearing in NewsstandAdditional considerations
• Icons need not be square■ Use a shape that matches your physical appearance
• You must still include CFBundlePrimaryIcon■ Standard and Newsstand icon are both needed
• Backward compatibility■ CFBundleIcons is required for Newsstand apps in iOS 5■ Can coexist with existing icon keys for earlier versions of iOS
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Creating a Newsstand AppDemo
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Handling Updates
Ben NielseniOS Application Engineering
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Retrieving and presenting content
• Informing the app• Organizing issues• Downloading content• Updating your icon
Handling Updates
ORGANIZINGUPDATING
INFORMING
DOWNLOADING
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Informing the AppHandling Updates
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Informing the AppPush notifications
DOWNLOADING
ORGANIZINGUPDATING
INFORMING
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‘content-available’:1
Informing the AppNewsstand Push Notifications
• Registration TypeUIRemoteNotificationTypeNewsstandContentAvailability
• Payload Key{
‘aps’:{
}
}
• Once per day■ NSUserDefaults: @”NKDontThrottleNewsstandContentNotifications”
DOWNLOADING
ORGANIZINGUPDATING
INFORMING
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<key>UIBackgroundModes</key>
<array>
<string> </string>
</array>
newsstand-content
Informing the AppNewsstand Push Notifications
• Background mode
• Limited time-[UIApplication beginTaskWithExpirationHandler:]
DOWNLOADING
ORGANIZINGUPDATING
INFORMING
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Organizing issuesHandling Updates
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Organizing IssuesUsing NKLibrary
• Provides persistent state for:■ Available issues■ Ongoing downloads■ Issue being read
• Organizes issues■ Uses app’s Caches directory■ Improves resource management
DOWNLOADING
UPDATING
INFORMING
ORGANIZING
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Organizing IssuesNKIssues
• Creating issues■ Unique name■ Publication date
NKIssue *myIssue = [myLibrary addIssueWithName:issueName date:issueDate];
■ Maintains a repository within the libraryNSURL *baseURL = [myIssue contentURL];
• Setting the current issue[myLibrary setCurrentlyReadingIssue:myIssue];
DOWNLOADING
UPDATING
INFORMING
ORGANIZING
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Downloading contentHandling Updates
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Downloading ContentNKAssetDownload
• Handles data transfer■ Keeps going
• Uses NSURLConnectionDelegate• Wake for critical events
newsstand-content
• Wi-Fi only in background
UPDATING
INFORMING
ORGANIZING
DOWNLOADING
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for (item in itemsToDownload) {
}
Setup
NSURLRequest *downloadRequest = [item URLRequest];
NKAssetDownload *asset = [issue addAssetWithRequest:downloadRequest];
NSArray *itemsToDownload = !! query server for list of assets
for (item in itemsToDownload) {
}
Downloading Content
NSArray *itemsToDownload = !! query server for list of assets
NSURLRequest *downloadRequest = [item URLRequest];
NKAssetDownload *asset = [issue addAssetWithRequest:downloadRequest];
NSURLConnection *connection = [asset downloadWithDelegate:myDelegate];
UPDATING
INFORMING
ORGANIZING
DOWNLOADING
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NSURLConnectionDownloadDelegate
[asset downloadWithDelegate:myDelegate];
• Implements NSURLConnectionDelegate■ Status■ Authentication■ Completion
• Modifications-connection:didReceiveData:
Downloading Content UPDATING
INFORMING
ORGANIZING
DOWNLOADING
NSURLConnectionDownloadDelegate
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Downloading ContentNSURLConnectionDownloadDelegate
[asset downloadWithDelegate:myDelegate];
• Implements NSURLConnectionDelegate■ Status■ Authentication■ Completion
• Modifications-connection:didWriteData:totalBytesWritten:expectedTotalBytesWritten:
-connectionDidResumeDownloading:totalBytesWritten:expectedTotalBytesWritten:
-connectionDidFinishLoading:
UPDATING
INFORMING
ORGANIZING
DOWNLOADING
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Downloading ContentNSURLConnectionDownloadDelegate
[asset downloadWithDelegate:myDelegate];
• Implements NSURLConnectionDelegate■ Status■ Authentication■ Completion
• Modifications-connection:didWriteData:totalBytesWritten:expectedTotalBytesWritten:
-connectionDidResumeDownloading:totalBytesWritten:expectedTotalBytesWritten:
-connectionDidFinishDownloading:destinationURL: required
UPDATING
INFORMING
ORGANIZING
DOWNLOADING
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Downloading ContentBackground
• What if the app is suspended?■ No status updates■ Wakes for authentication and completion
• What if the app is terminated!?■ Relaunched in the background
UIApplicationLaunchOptionsNewsstandDownloadsKey
NSString *assetIdentifier = [myAssetDownload identifier];
UPDATING
INFORMING
ORGANIZING
DOWNLOADING
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Reconnecting
• Reconnect on launchNKLibrary *library = [NKLibrary sharedLibrary];
for (NKAssetDownload *asset in [library downloadingAssets])
NSURLConnection *connection = [asset downloadWithDelegate:myDelegate];
• Always!■ Abandoned downloads may get cancelled
Downloading Content
NSURLConnection *connection = [asset downloadWithDelegate:myDelegate];
NKLibrary *library = [NKLibrary sharedLibrary];
for (NKAssetDownload *asset in [library downloadingAssets])
UPDATING
INFORMING
ORGANIZING
DOWNLOADING
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Downloading ContentCompletion
• Success!-connectionDidFinishDownloading:destinationURL:
■ Destination is a temporary file■ Move to issue repository
[myIssue contentURL]
■ Process-[UIApplication beginTaskWithExpirationHandler:];
UPDATING
INFORMING
ORGANIZING
DOWNLOADING
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Downloading contentDemo
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Updating Your Newsstand Icon
Jon Drummond
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Updating Your Newsstand IconShowing off your new content
• Part of getting new content is obtaining a new icon
• Once content is ready to view, show it off!■ Update your Newsstand icon■ Inform readers of new issues via badging
June 2011
INFORMING
ORGANIZING
DOWNLOADING
UPDATING
May 2011
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Updating Your Newsstand IconUpdate your icon
• Publication covers play a huge role in the physical newsstand■ We want your icons to do the same here
• Your icon should represent your most recent content■ But don’t show it until your content is ready to read!
• Changes the appearance of your app in Newsstand and app switcher■ Overrides your UINewsstandIcon, not your standard app icon
INFORMING
ORGANIZING
DOWNLOADING
UPDATING
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Updating Your Newsstand IconUpdate your icon
• Simple!-[UIApplication setNewsstandIconImage:(UIImage*)]
• Can be used while running in the background, so update whenever your content is ready
INFORMING
ORGANIZING
DOWNLOADING
UPDATING
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Updating Your Newsstand IconBadge your app
• Badges in Newsstand have a revised look: “New” sash• Add a badge when a user has not yet opened a particular issue
■ Remove the badge once it has been read
INFORMING
ORGANIZING
DOWNLOADING
UPDATING
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Updating Your Newsstand IconBadge your app
• Uses existing badge API-[UIApplication setApplicationIconBadgeNumber:(NSInteger)]
• As with normal badging...■ Non-zero value shows the sash■ Zero clears the sash
• The count is not shown, but it should track your unread issues
INFORMING
ORGANIZING
DOWNLOADING
UPDATING
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Updating Your Newsstand Icon- (void)connectionDidFinishDownloading:(NSURLConnection*)connection
destinationURL:(NSURL*)destinationURL {
}
INFORMING
ORGANIZING
DOWNLOADING
UPDATING
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Updating Your Newsstand Icon- (void)connectionDidFinishDownloading:(NSURLConnection*)connection
destinationURL:(NSURL*)destinationURL {// get issue content locationNKIssue *latestIssue = [[connection newsstandAssetDownload] issue];NSURL *issueURL = [[latestIssue contentURL] URLByAppendingPathComponent:...];
}
INFORMING
ORGANIZING
DOWNLOADING
UPDATING
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Updating Your Newsstand Icon- (void)connectionDidFinishDownloading:(NSURLConnection*)connection
destinationURL:(NSURL*)destinationURL {// get issue content locationNKIssue *latestIssue = [[connection newsstandAssetDownload] issue];NSURL *issueURL = [[latestIssue contentURL] URLByAppendingPathComponent:...];
// move issue into place -- don’t forget to check errors!NSFileManager *fileManager = [NSFileManager defaultManager];[fileManager moveItemAtURL:destinationURL toURL:issueURL error:NULL];
}
INFORMING
ORGANIZING
DOWNLOADING
UPDATING
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Updating Your Newsstand Icon- (void)connectionDidFinishDownloading:(NSURLConnection*)connection
destinationURL:(NSURL*)destinationURL {// get issue content locationNKIssue *latestIssue = [[connection newsstandAssetDownload] issue];NSURL *issueURL = [[latestIssue contentURL] URLByAppendingPathComponent:...];
// move issue into place -- don’t forget to check errors!NSFileManager *fileManager = [NSFileManager defaultManager];[fileManager moveItemAtURL:destinationURL toURL:issueURL error:NULL];
// get our new icon and update our app!UIImage *newIcon = [self getIconFromIssue:latestIssue]; // up to you
}
INFORMING
ORGANIZING
DOWNLOADING
UPDATING
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Updating Your Newsstand Icon- (void)connectionDidFinishDownloading:(NSURLConnection*)connection
destinationURL:(NSURL*)destinationURL {// get issue content locationNKIssue *latestIssue = [[connection newsstandAssetDownload] issue];NSURL *issueURL = [[latestIssue contentURL] URLByAppendingPathComponent:...];
// move issue into place -- don’t forget to check errors!NSFileManager *fileManager = [NSFileManager defaultManager];[fileManager moveItemAtURL:destinationURL toURL:issueURL error:NULL];
// get our new icon and update our app!UIImage *newIcon = [self getIconFromIssue:latestIssue]; // up to youUIApplication *app = [UIApplication sharedApplication];[app setNewsstandIconImage:newIcon];[app setApplicationIconBadgeNumber:[app applicationIconBadgeNumber]+1];
}
INFORMING
ORGANIZING
DOWNLOADING
UPDATING
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Updating your Newsstand iconDemo
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Summary
• Becoming a Newsstand app is easy• Get content updates in the background• Use NewsstandKit to download and organize content• Update your Newsstand icon and badge to show off your content
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Vicki MurleySafari Technology Evangelistvicki@apple.com
More Information
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App Publishing with iTunes Connect PresidioThursday 10:15AM
Local and Push Notifications Pacific HeightsThursday 4:30PM
Related Sessions
Adopting Multitasking Russian HillThursday 4:30PM
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Newsstand Lab Internet & Web Lab BThursday 2:00PM
Local and Push Notifications Lab Internet & Web Lab AFriday 9:00AM
Labs
App Publishing with iTunes Connect Lab Internet & Web Lab AThursday 2:00PM
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Q&A
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