make.height.mas_equalTo Issue

[jjyygg]

I want to make two views as my cell's separate line.So I code this make.height.mas_equalTo(0.5).However，the height of one line is 0.666667 and the height of the other line is 0.333333. I used the simulator is iPhone6s plus. When I use the iphone6s display is normal.When I set the constraint height to 0.6, the height of both lines is 0.666667. I would like to know why this is the end.

[topjx]

How did you solve the problem?

[Jason8Zhang]

I have got the same problem, so what is the solvation?