About Navigationbar background chromatic aberration problem with black border below solution

Background chromatic aberration, the reason is that if the simple setting background color also has the effect of Gaussian blur, the solid color Gaussian blur after the equivalent of a solid color 70% (guess) transparent processing, but the color is bad anyway.

Workaround One:

Through the picture method

[Self.navigationController.navigationBar setbackgroundimage:[uiimage imagenamed:@ "navigation_ BackgroundImage"] forbarmetrics:uibarmetricsdefault];

Method Two:

Self.navigationController.navigationBar.translucent = NO; //     bar Blur effect, default is Yes

Below black border elimination method:

[[Uinavigationbar appearance] Setbackgroundimage:[[uiimage alloc] init] forbarposition:uibarpositionany barMetrics: Uibarmetricsdefault]; [[Uinavigationbar appearance] Setshadowimage:[[uiimage alloc] init];

To set a shadow:

[[Uinavigationbar appearance] Setshadowimage:[[uiimage alloc] init];

About Navigationbar background chromatic aberration problem with black border below solution