IOS开发之——上下左右移动(6)

一 概述

本文介绍给UIButton设置background图片，并设置点击高亮时的图片，并通过上下左右按钮，控制UIButton上下左右移动

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二 界面布局

1. 将图片资源拖放到Assets.xcassets目录下

2. 在main.storyboard上布局如下

三 代啊实现

3.1 OC

3.1.1 ViewController.h

#import <UIKit/UIKit.h>
@interface ViewController : UIViewController
@property (weak, nonatomic) IBOutlet UIButton *iconButton;
@end

3.1.2 ViewController.m

#import "ViewController.h"
​
@interface ViewController ()
​
@end
typedef enum
{
    moveDirTop=11,
    moveDirLeft=12,
    moveDirBottom=13,
    moveDirRight=14
    
}moveDirect;
​
#define moveDelta 20;
​
@implementation ViewController
- (IBAction)move:(UIButton*)button {
    CGRect frame=self.iconButton.frame;
    
    switch (button.tag) {
        case moveDirTop:
            frame.origin.y-=moveDelta;
            break;
        case moveDirLeft:
            frame.origin.x-=moveDelta;
            break;
        case moveDirBottom:
            frame.origin.y+=moveDelta;
            break;
        case moveDirRight:
            frame.origin.x+=moveDelta;
            break;
            
        default:
            break;
    }
    self.iconButton.frame=frame; 
}
​
- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
}
@end

3.2 Swift实现

3.2.1 ViewController.swift

import UIKit
​
enum moveDir:Int {
    case moveTop = 11
    case moveLeft = 12
    case moveBottom = 13
    case moveRight = 14
}
let moveLata:Double = 20.0
​
class ViewController: UIViewController {
​
    @IBOutlet weak var moveButton: UIButton!
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view.
    }
    @IBAction func move(_ button: UIButton) {
        var frame:CGRect=self.moveButton.frame
        switch button.tag {
        case moveDir.moveTop.rawValue:
            frame.origin.y-=CGFloat(moveLata)
            break
        case moveDir.moveLeft.rawValue:
            frame.origin.x-=CGFloat(moveLata)
            break;
        case moveDir.moveBottom.rawValue:
            frame.origin.y+=CGFloat(moveLata)
            break;
        case moveDir.moveRight.rawValue:
            frame.origin.x+=CGFloat(moveLata)
            break;
            
        default:
            break;
        }
        
        moveButton.frame = frame
    }   
}