ios - Animated change colour of UIView -

i want change colour of view while swiping don't know how animated colour change. i'll grateful help.

work calayer, if search find lot's of easy examples, 1 example, ray wenderlich, find great.

uiview

- (void)changecolorwithfillinganimation {     //we create view increase in size top bottom, thats why starts these frame parameters     uiview *fillingview = [[uiview alloc] initwithframe:cgrectmake(0, self.view.bounds.size.height - 1, self.view.bounds.size.width, 1)];     //set color want change     fillingview.backgroundcolor = [uicolor bluecolor];     //add view want change color     [self.view addsubview:fillingview];      [uiview animatewithduration:2.0 animations:^{         //this make view animates up, since animating frame target view's size         fillingview.frame = self.view.bounds;     } completion:^(bool finished) {         //set color want , disappear filling view.         self.view.backgroundcolor = [uicolor bluecolor];         [fillingview removefromsuperview];     }]; } 

cashapelayer + cabasicanimation + catransition

- (void)changecolorwithshapelayer {     //create initial , final path.     uibezierpath *frompath = [uibezierpath bezierpathwithrect:cgrectmake(0, self.view.bounds.size.height - 1, self.view.bounds.size.width, 1)];     uibezierpath *topath = [uibezierpath bezierpathwithrect:cgrectmake(0, 0, self.view.bounds.size.width, self.view.bounds.size.height)];     //create shape layer animated     cashapelayer *fillingshape = [cashapelayer layer];     fillingshape.path = frompath.cgpath;     fillingshape.fillcolor = [uicolor bluecolor].cgcolor;     //create animation shape layer     cabasicanimation *animatedfill = [cabasicanimation animationwithkeypath:@"path"];     animatedfill.duration = 2.0f;     animatedfill.fromvalue = (id)frompath.cgpath;     animatedfill.tovalue = (id)topath.cgpath;      //using catransaction can set completion block     [catransaction begin];      [catransaction setcompletionblock:^{         //when animation ends, want set proper color itself!         self.view.backgroundcolor = [uicolor bluecolor];     }];      //add animation shape layer, add shape layer sublayer on view changing color     [fillingshape addanimation:animatedfill forkey:@"path"];     [self.view.layer addsublayer:fillingshape];      [catransaction commit]; } 

one simple way accomplish use uiview animation block.

[uiview animatewithduration:1.0 animations:^{     view.backgroundcolor = [uicolor redcolor]; }];