ios - Centering in Storyboard -


i little bit confused xcode 6 storyboard.

the auto layout seems powerful tool build ui different devices. however, no matter kinds of layout chose (compact or height/width) or uncheck "use auto layout" , "use size classes", mapped in storyboard view looks different when testing (using iphone 6).

for example if left uibutton @ center of storyboard, little right down away center when appears on iphone 6.

could please give me on this. maybe iphone6 instead of different devices. thank much.

if want center ui element check both horizontal center in container , vertical center in container in storyboard constraints alignment popover.

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