Swift语言之View,Button控件实现小方块在界面上的移动（纯代码实现）

import UIKit

class ViewController:
UIViewController {

var diamonds:UIView!

var diamondsXY = CGRectMake(0,200,50,50)

override func viewDidLoad() {

super.viewDidLoad()

//定义一个方块

diamonds = UIView(frame:
diamondsXY)

diamonds.backgroundColor =
UIColor.redColor()

self.view.addSubview(diamonds)

//定义向上移动的按钮

var btUp:UIButton =
UIButton.buttonWithType(UIButtonType.System)
as UIButton

btUp.frame =
CGRectMake(0,30,80,20)

btUp.setTitle("UP",forState:UIControlState.Normal)

btUp.addTarget(self,action:"upMove:",forControlEvents:UIControlEvents.TouchUpInside)

self.view.addSubview(btUp)

//定义向下移动的按钮

var btDown:UIButton =
UIButton.buttonWithType(UIButtonType.System)
as UIButton

btDown.frame =
CGRectMake(50,30,80,20)

btDown.setTitle("Down",forState:UIControlState.Normal)

btDown.addTarget(self,action:"downMove:",forControlEvents:UIControlEvents.TouchUpInside)

self.view.addSubview(btDown)

//定义向左移动的按钮

var btLeft:UIButton =
UIButton.buttonWithType(UIButtonType.System)
as UIButton

btLeft.frame =
CGRectMake(100,30,80,20)

btLeft.setTitle("Left",forState:UIControlState.Normal)

btLeft.addTarget(self,action:"leftMove:",forControlEvents:UIControlEvents.TouchUpInside)

self.view.addSubview(btLeft)

//定义向右移动的按钮

var btRight:UIButton =
UIButton.buttonWithType(UIButtonType.System)
as UIButton

btRight.frame =
CGRectMake(150,30,80,20)

btRight.setTitle("Right",forState:UIControlState.Normal)

btRight.addTarget(self,action:"rightMove:",forControlEvents:UIControlEvents.TouchUpInside)

self.view.addSubview(btRight)

}

func upMove(sender:
UIButton)// 调用向上移动的方法

{

var c = diamonds.frame

if c.origin.y ==

{

return

}

else

{

var newXY = CGRectMake(c.origin.x,c.origin.y -
10,c.size.width,c.size.height)

diamonds.frame = newXY

}

}

func downMove(sender:
UIButton)// 调用向下移动的方法

{

var c = diamonds.frame

if c.origin.y ==

{

return

}

else

{

var newXY = CGRectMake(c.origin.x,c.origin.y +
10,c.size.width,c.size.height)

diamonds.frame = newXY

}

}

func leftMove(sender:
UIButton)// 调用向左移动的方法

{

var c = diamonds.frame

if c.origin.x ==

{

return

}

else

{

var newXY = CGRectMake(c.origin.x -
10,c.origin.y,c.size.width,c.size.height)

diamonds.frame = newXY

}

}

func rightMove(sender:
UIButton)// 调用向左移动的方法

{

var c = diamonds.frame

if c.origin.x ==

{

return

}

else

{

var newXY = CGRectMake(c.origin.x +
10,c.origin.y,c.size.width,c.size.height)

diamonds.frame = newXY

}

}

// Do any additional setup after loading the view, typically from a nib.

override func didReceiveMemoryWarning() {

super.didReceiveMemoryWarning()

// Dispose of any resources that can be recreated.

}

}