自定义tabBar的背景以及item

由于公司项目，需要一个透明的tabbar,结果发现sb 中无法设置。于是在代码中实现
用到几个关键的属性

 //设置uiimage
 
 
 
  
image.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)
 //设置背景
 
  
tabBar.backgroundImage
 //去掉横线
 
  
 
tabBar.shadowImage
 // 获取每个item
 4.var items:[UITabBarItem] = self.tabBar.items as! [UITabBarItem]
 //设置item 的图片，以及选中效果图片
 items[0].image
 items[0].selectedImage
 

在viewDidLoad()中加入以下代码

 var image :UIImage=UIImage(named: "tabbarbg.png")! self.tabBar.backgroundImage=image.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)
 self.tabBar.shadowImage=image.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)
 self.tabBar.frame=CGRectMake(0, UIScreen.mainScreen().bounds.height-70,
 UIScreen.mainScreen().bounds.width, 84);
 
 var items:[UITabBarItem] = self.tabBar.items as! [UITabBarItem]
 var image1 :UIImage=UIImage(named: "commen_home_false")!
 items[0].image=image1.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)
 var select_image1 :UIImage=UIImage(named: "commen_home")!
 items[0].selectedImage=select_image1.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)
 var image2 :UIImage=UIImage(named: "commen_nearby_false")!
 items[1].image=image2.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)
 var select_image2 :UIImage=UIImage(named: "commen_nearby")!
 items[1].selectedImage=select_image2.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)
 
 var image3 :UIImage=UIImage(named: "commen_calendar_false")!
 items[2].image=image3.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)
 var select_image3 :UIImage=UIImage(named: "commen_calendar")!
 items[2].selectedImage=select_image3.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)
 var image4 :UIImage=UIImage(named: "commen_calendar")!
 items[3].image=image4.imageWithRenderingMode(UIImageRenderingMode.AlwaysOriginal)
  
  
 

实现效果

tab.png