IOS8 new Features (2)--uipopovercontroller

I. Previous use of Uipopovercontroller

are used only on ipad

1 /**2 * Uipopovercontroller can only be used on ipad, on, iphone use will crash3  */4-(void) Old5 {6VC2 *VC =[[VC2 alloc]init];7     8     Uipopovercontroller*popover =[[Uipopovercontroller ALLOC]INITWITHCONTENTVIEWCONTROLLER:VC];9 [PopOver presentpopoverfromrect: self.btn.bounds inView:self.btn permittedarrowdirections: Uipopoverarrowdirectionany Animated:yes];Ten}

Second, the Unified way:

1-(void)New2 {3VC2 *VC =[[VC2 alloc]init];4     5     //The following three lines of code will be ignored in the iphone6     //but on the ipad, we're present as present a popover.7     //so it's a good way to co-exist with the iphone and ipad.8Vc.Modalpresentationstyle=Uimodalpresentationpopover;9Vc.Popoverpresentationcontroller.sourcerect=self.btn.bounds;TenVc.Popoverpresentationcontroller.sourceview=self.btn; One      A [Self presentviewcontroller: VC animated:yes Completion:nil]; -}

IOS8 new Features (2)--uipopovercontroller