swift 数组查找删除

先找到数据的位置再删除或修改

• Swift 2.2

 
let index = self.serial?.indexOf(serial)
        
guard index != nil else {
    return false
}
        
self.serial?.removeAtIndex(index!)

• Swift 3.0

let index = self.serial?.index(of: serial)
self.serial?.remove(at: index!)