Swift development-using UIButton as the mask board for image scaling, swiftuibutton

Swift development-using UIButton as the mask board for image scaling, swiftuibutton

Many partners always think that scaling images is very troublesome, because they do not know where to start, especially in the face of new development languages. In fact, there are many ways to scale images, but they are always different, that is frame. The following is an image scaling demo using the mask. If you are interested, you can take a look.

//

// ViewController. swift

// Resize the image

//

// Created by yueda Technology on 15/1/15.

// Copyright (c) 2015 BSY. All rights reserved.

//

Import UIKit

Class ViewController: UIViewController {

Var imageview = UIImageView ()

Var button = UIButton ()

Override func viewDidLoad (){

Super. viewDidLoad ()

// Initialize UIImageView

Var imageview: UIImageView = UIImageView (frame: CGRectMake (100,100,100,100 ))

Var image = UIImage (named: "1024 ")

Imageview. image = image

Self. view. addSubview (imageview)

Self. imageview = imageview

// Initialize UIButton (mask)

Var button: UIButton = UIButton. buttonWithType (UIButtonType. Custom) as UIButton

Var frame = imageview. frame

Button. frame = frame

Self. view. addSubview (button)

Button. addTarget (self, action: "changeImage:", forControlEvents: UIControlEvents. TouchUpInside)

Self. button = button

Self. button. selected = false

}

// Initialize UIButton method implementation

Func changeImage (sender: UIButton ){

[UIView. beginAnimations ("", context: nil)];

[UIView. setAnimationDelay (0.1)];

[UIView. setAnimationDuration (0.5)];

Self. button. selected =! Sender. selected

If (self. button. selected = true ){

Self. imageview. frame = UIScreen. mainScreen (). bounds

} Else if (self. button. selected = false ){

Self. imageview. frame = CGRectMake (100,100,100,100)

[UIView. commitAnimations];}

}