ios - ScaleToFit does not work -

i have problems scaletofit method. have uipageviewcontroller uiimagesview , want show different pictures in it, not work should.

with these 2 lines initialize picture.

self.screenpicture.image = [uiimage imagenamed:@"1.png"]; self.screenpicture.contentmode = uiviewcontentmodescaleaspectfit; 

it's build in case structure, decides picture user can see.

switch(self.index)     {         case zero: {             self.screennumber.text = [nsstring stringwithformat:@"1.", nil];             self.screenpicture.image = [uiimage imagenamed:@"1.png"];             self.screenpicture.contentmode = uiviewcontentmodescaleaspectfit;             nslog(@"%d",self.index);             break;         }         case one: {             self.screennumber.text = [nsstring stringwithformat:@"2.", nil];             self.screenpicture.image = [uiimage imagenamed:@"2.png"];             self.screenpicture.contentmode = uiviewcontentmodescaleaspectfit;             nslog(@"%d",self.index);             break;         }         case two: {             self.screennumber.text = [nsstring stringwithformat:@"3.", nil];             self.screenpicture.image = [uiimage imagenamed:@"3.png"];             self.screenpicture.contentmode = uiviewcontentmodescaleaspectfit;             nslog(@"%d",self.index);             break;         }         case three: {             self.screennumber.text = [nsstring stringwithformat:@"4.", nil];             self.screenpicture.image = [uiimage imagenamed:@"4.png"];             self.screenpicture.contentmode = uiviewcontentmodescaleaspectfit;             nslog(@"%d",self.index);             break;         }         default: {             self.screennumber.text = [nsstring stringwithformat:@"5.", nil];             self.screenpicture.image = [uiimage imagenamed:@"5.png"];             self.screenpicture.contentmode = uiviewcontentmodescaleaspectfit;             nslog(@"%d",self.index);             break;         }     } 

in app picture in original size, big. why scaleaspectfit-method not working?

can me?

thanks:)

according ios developer library:

the content mode specifies how cached bitmap of view’s layer adjusted when view’s bounds change.

...and not other way around. seem want resize view based on content, contentmode opposite.