navigationBar筆記

//導航欄顏色
self.navigationBar.barTintColor = [Util colorWithHexString:@"9f1105"];
//導航欄字體大小,字體顏色
self.navigationBar.titleTextAttributes = @{NSForegroundColorAttributeName:[UIColor whiteColor],NSFontAttributeName:[UIFont systemFontOfSize:25]};
//設置背景圖片
[self.navigationBar setBackgroundImage:[UIImage imageNamed:@"back"] forBarMetrics:UIBarMetricsDefault];

[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];
或者

//相對於上面的接口，這個接口能夠動畫的改變statusBar的前景色
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent animated:YES];