When iOS10 Navigationcontroller push, navigationbar flashed a white stripe.

There's a 1px line underneath the Navigationbar to hide this line so that Navigationbar and the following are connected.

Color
    self.navigationController.navigationBar.barTintColor = [Thememanager navicolor];
    Clear Shadow
    self.navigationController.navigationBar.shadowImage = [UIImage new];
    Hide I px buttom line
    [Self.navigationController.navigationBar setbackgroundimage:[uiimage new]
                                                 Forbarposition:uibarpositionany
                                                     Barmetrics:uibarmetricsdefault];
    
    Self.navigationController.navigationBar.translucent = NO;

Then it went to iOS 10. Or the original app, or the original code, push the time navigationbar flashing white stripes.

The question is this sentence

[Self.navigationcontroller.navigationbarsetbackgroundimage:[uiimagenew]

Forbarposition:uibarpositionany

Barmetrics:uibarmetricsdefault];

Change it like this.

Color
    self.navigationController.navigationBar.barTintColor = [Thememanager navicolor];
    Clear Shadow
    self.navigationController.navigationBar.shadowImage = [UIImage new];
    if (![ Nsprocessinfo.processinfo isoperatingsystematleastversion: (nsoperatingsystemversion) {9,4,0}]) {
        //Hide I px Buttom line
        [Self.navigationController.navigationBar setbackgroundimage:[uiimage new]
                                                     forbarposition: Uibarpositionany
                                                         Barmetrics:uibarmetricsdefault];
    }
    
    Self.navigationController.navigationBar.translucent = NO;