Weird UITabBar background issue on iPhone6 Simulator, iOS8 - xcode

Hi I have weird problem on iPhone6, iOS8 in iPhone simulator (unfortunately I don't have actual device to test yet).
I have background view whose bottom edge is exactly to top edge of UITabBar 0px overlap, background is in golden colour.
This problem only occurs on iPhone6, on iPhone6 plus and iPhone5 all is ok.
Tab bar on iPhone6 simulator:
Same tabbar on iPhone6 Plus simulator:
Same on iPhone5:
Anyone experienced anything similar?
Do you have any suggestion how to fix this?
Should I ignore it, if its simulator only issue?

Did you check the #3x, #2x, #1x image size? sometimes is has an issue with those assets.

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I am new to Xcode 6 and Swift, so I was checking it out and crafting a simple app but I encountered several problems:
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All my problems and (little) code I've written is as shown:
I would appreciate any tips/help you guys can give me!
Thank you in advance!
Jack.
I have had similar issue some times on simulator, use ⌘+K or Hardware > Keyboard > Toggle Software Keyboard to prompt keyboard.
When change width and height of storyboard, examine closely the the descriptions (width, height, portrait, landscape) in the popup, I suggest choose the width and height that matches your device and orientation.
Hope this helps.
It is because of auto layout. Here is a link to guide you through.
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I have come across this issue recently and it was a weird bug. For whatever reason, the x/y axis was off in what I was seeing in Storyboard. So the UILabel and UITextfield I had were being displayed behind my NavigaionBar. I adjusted the x/y values in the size inspector on the right side pane of Xcode and it worked perfectly. Those value should be an accurate representation of the placement of storyboard objects.
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How it looks on the iPhone simulator:
And on the iPad simulator:
I don't think that's an SDK issue, I bet that you are writing code that fits for the iPhone screen and not for the larger iPad screen.
I think that you added just the button and is Autoresizing Mask is not set properly.
I've done some measurement an it seems that:
The distance from the top of the view is in fixed (~360px);
The width is fixed (~260px);
You need to give the button a fixed distance from the bottom (as it should stay on under the plot) and remove the left fixed margin so it can be centered.
You need to take a look at the UIViewAutoresizingMask for the UIView's autoresizingMask property.
button.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin;

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