CODEWITHSUNDEEP
iosswiftuiimagesegue
Makaille
Makaille

Reputation: 1666

pass UIImage with a segue

I want to pass an UIImage between two view with a segue. The problem is that my UIImage appear white in the second view controller.

The segue : 

var screenShot = UIImage()

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if (segue.identifier == "screenshotEmbed") {
        let svc = segue.destinationViewController as! screenshotViewController
        svc.toPass = self.screenshot
    }

The secondViewController :

class screenshotViewController: UIViewController {

@IBOutlet var screenshotView: UIImageView!
var toPass = UIImage()

override func viewDidLoad() {
    super.viewDidLoad()
    self.screenshotView.image = self.toPass        
}

}

My UIImage is just a screenshot, here the function :

func captureScreen() -> UIImage {
    var window: UIWindow? = UIApplication.sharedApplication().keyWindow
    window = UIApplication.sharedApplication().windows[0]
    UIGraphicsBeginImageContextWithOptions(window!.frame.size, window!.opaque, 0.0)
    window!.layer.renderInContext(UIGraphicsGetCurrentContext()!)
    let image = UIGraphicsGetImageFromCurrentImageContext()
    UIGraphicsEndImageContext()
    return image;
}

EDIT. Screenshot storage on a button :

@IBAction func photoAction(sender: AnyObject) {
    self.screenShot = captureScreen()
}

I've tried lot of thing but still blank (not empty cause the memory adress is good).

Upvotes: 0

Views: 220

Answers (2)

xiaoming
xiaoming

Reputation: 130

in second scene you should modified the property to 

var toPass: UIImage!

because in second scene you initial the image to UIImage()

Upvotes: 0

Dharmesh Kheni
Dharmesh Kheni

Reputation: 71862

Not sure if your screenshotImage object has Image or not.

I tried below code and it's working fine.

import UIKit

class ViewController: UIViewController {

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
        if (segue.identifier == "screenshotEmbed") {
            let svc = segue.destinationViewController as! ScreenshotViewController
            svc.toPass = captureScreen()
        }
    }

    func captureScreen() -> UIImage {
        var window: UIWindow? = UIApplication.sharedApplication().keyWindow
        window = UIApplication.sharedApplication().windows[0]
        UIGraphicsBeginImageContextWithOptions(window!.frame.size, window!.opaque, 0.0)
        window!.layer.renderInContext(UIGraphicsGetCurrentContext()!)
        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return image;
    }

}

Result with this code:

enter image description here

Project Sample for more Info.

Upvotes: 1

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