在ios 9中使用stackview中的图像调整RoundStyled文本字段的大小

I am new to stackview. Problem I'm facing is with the size of the roundStyled Textfield with image , whose size is correct after stacking. But it is shrinking after running in the simulator and its size is not changing even after the hight and width is varied.I am new to stackview. Problem I'm facing is wi