ios - Why my UIWebview cannot 'full' screen? -

i have uiwebview built on xib following settings:

[self.webview setscalespagetofit:yes]; self.webview.opaque = no; 

however, there white spaces on bottom, while if try on mac's chrome , ios simulator's safari, doesn't have white space. setting lack in uiwebview?

try code

- (void)initwebview {     self.webview.scalespagetofit=no;     [self.webview setopaque:no];     self.webview.autoresizingmask = uiviewautoresizingflexibleheight | uiviewautoresizingflexiblewidth | uiviewautoresizingflexibletopmargin | uiviewautoresizingflexiblebottommargin | uiviewautoresizingflexibleleftmargin | uiviewautoresizingflexiblerightmargin ;     [(uiscrollview*)[self.webview.subviews objectatindex:0] setshowshorizontalscrollindicator:no];     [(uiscrollview*)[self.webview.subviews objectatindex:0] setshowsverticalscrollindicator:no];     [self.webview.scrollview flashscrollindicators];     self.webview.frame=self.view.bounds;     self.webview.opaque = no;     self.webview.backgroundcolor = [uicolor whitecolor];     self.webview.scrollview.scrollenabled = yes; } 

in viewdidload method invoke later as,

[self initwebview ];