iOS设置系统导航栏是颜色感觉变浅

设置系统导航时，颜色感觉变浅，并且项目的布局已经完成了的情况下可以给你的导航栏基类里插入一个大小宽高为frame.size.width, frame.size.height+20的底图 

话不多说上代码：

 
 
if([[UIDevicecurrentDevice].systemVersionintegerValue] >9) {
 
 
for(UIView* viewinself.navigationBar.subviews) {
 
 
if([viewisKindOfClass:NSClassFromString(@"_UIBarBackground")]) {
 
 
view.hidden=YES;
 
 
view.frame= (CGRect){0,0,0,0};
 
 
for(UIView*separatorinview.subviews) {
 
 
if([separatorisKindOfClass:[UIImageViewclass]]) {
 
 
[separatorsetHidden:YES];
 
 
}
 
 
}
 
 
}
 
 
}
 
 
}
 
 
UIView* alphaView = [[UIViewalloc]initWithFrame:CGRectMake(0,0,self.navigationBar.frame.size.width,self.navigationBar.frame.size.height+20)];
 
 
alphaView.alpha=1;
 
 
alphaView.backgroundColor=NavBar_Bg_Color;
 
 
[self.navigationBarsetBackgroundImage:[[UIImagealloc]init]forBarMetrics:UIBarMetricsCompact];
 
 
[self.viewinsertSubview:alphaViewbelowSubview:self.navigationBar];
 
 
 
 
完成