iOS的一些小技巧

状态栏文字颜色修改

//info.plist中添加一个字段：view controller -base status bar 设置为NO 设置状态栏文字为白色

//有动画效果
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent animated:YES];

//无动画效果
[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent];

状态栏自定义～

UIView *statusBarView=[[UIView alloc] initWithFrame:CGRectMake(0, 0, 320, 20)];

statusBarView.backgroundColor=[UIColor blackColor];

[YouNav.view addSubview:statusBarView];

[[UIApplication sharedApplication] setStatusBarStyle:UIStatusBarStyleLightContent animated:NO];

Tabbar透明

 UITabBarController *tabVC = [[UITabBarController alloc] init];
    //获得tabbar
 UITabBar *tabBar = tabVC.tabBar;
    //设置透明度
  [tabBar setAlpha:0.8f];

待续。。。