WWDC笔记:2013 Session 203 What’s New in Cocoa Touch(未完)

Multitasking 

• Background fetching 
  • New background mode fetch
  • - (void)application:(UIApplication *)application performFetchWithCompletionHandler:(void (^)(UIBackgroundFetchResult result))completionHandler;
  • Tuning the fetch interval - (void)setMinimumBackgroundFetchInterval:(NSTimeInterval)minInterval; const NSTimeInterval UIApplicationBackgroundFetchIntervalMinimum const NSTimeInterval UIApplicationBackgroundFetchIntervalNever
• Remote notifications 
  • - (void)application:(UIApplication *)application didReceiveRemoteNotification:(NSDictionary *)userInfo fetchCompletionHandler:(void (^)(UIBackgroundFetchResult result))completionHandler;
  • typedef NS_ENUM(NSUInteger, UIBackgroundFetchResult) { UIBackgroundFetchResultNewData, UIBackgroundFetchResultNoData, UIBackgroundFetchResultFailed }
• Background transfers 
  • NSURLSession Replacement API for NSURLConnection
  • - (void)application:(UIApplication *)application handleEventsForBackgroundURLSession:(NSString *)identifier completionHandler:(void (^)())completionHandler;

Related Session

• What’s New in Foundation Networking 

Views and Images 

Image Rendering Modes 

• Creating an image with a rendering mode      - (UIImage *)imageWithRenderingMode:(UIImageRenderingMode)renderingMode;
• Pass the mode       typedef NS_ENUM(NSInteger, UIImageRenderingMode) { UIImageRenderingModeAutomatic, UIImageRenderingModeAlwaysOriginal, UIImageRenderingModeAlwaysTemplate }

Tint Color