iOS Tab item fuzzy image

Question

The size of the original fuzzier image(tab2) is 2x: 108 × 88 pixels, 3x: 162 × 132 pixels, the normal image(tab1, tab3) size is 2x: 52 × 48 pixels, 3x: 78 × 72 pixels. I run the app on iPhone7 simulator with iOS 10, Xcode 8.1, the result:

The original image:

I also changed the setting of the Tab item as below:

What's wrong with me? I'd like to set it as below:

Answer 1

I've fixed this question as @Tj3n's suggestion, please refer to the below pic which I've marked a red rectangle: