在appDelegate中加上:
[[UINavigationBar appearance]setBackgroundImage:[[UIImage alloc]init] forBarMetrics:UIBarMetricsDefault] ;
[[UINavigationBar appearance]setShadowImage:[[UIImage alloc]init]];
在appDelegate中加上:
[[UINavigationBar appearance]setBackgroundImage:[[UIImage alloc]init] forBarMetrics:UIBarMetricsDefault] ;
[[UINavigationBar appearance]setShadowImage:[[UIImage alloc]init]];