ios - Autolayout constraint is not working after animation -

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• ios: how 1 animate new autolayout constraint (height) 6 answers

i little bit new @ autolayout.i know tons of question , tutorial available regarding autolayout have not found solution.so in advance help.

what requirement?

i have make uiview come screen after pressing button bottom side of screen animation.(like keyboard).i have made uiview in xib file using autolayout.so far have done this.

in viewdidload:

//loading custom uiview  containerview = [[sharingpickerview alloc] init]; [containerview loadingmenus:pickerdata]; [self.view addsubview:containerview]; 

in view contatains (a scrollview page controller cancel button)

in viewwilllayoutsubviews:

-(void)viewwilllayoutsubviews{ [super viewwilllayoutsubviews];  //changing frame of view bottom side of screen can animate later bottom top later.  containerview.frame = cgrectmake(0, self.view.frame.size.height, self.view.frame.size.width, containerview.frame.size.height); [containerview setbackgroundcolor:[[uicolor colorwithred:231.0/255.0f green:231.0/255.0f blue:231.0/255.0f alpha:1.0f] colorwithalphacomponent:0.3]]; } 

now on press animation.

-(void)sharepickerview{    [uiview animatewithduration:1 animations:^(){    containerview.frame = cgrectmake(0,self.view.frame.size.height-containerview.frame.size.height, self.view.frame.size.width, containerview.frame.size.width);    } completion:^(bool isfinished){   nslog(@"animation finish");    }]; } 

here re-framing view showing animation bottom portion(cancel button of view) not showing in iphone 6 simulator showing iphone 5s device.

regards emon.

try use size constraints outlets. can easy change values of constraints. it's not recommended modify frame when using auto-layout.

declare property:

@property (strong, nonatomic) iboutlet nslayoutconstraint *heightconstraint; 

and in implementation:

heightconstraint = self.view.frame.size.height; 

also post may helpful: autolayout, constraints , animation