How to create an image from UILabel?

user_552488 0
Viewed 18624

I'm currently developing a simple photoshop like application on iphone. When I want to flatten my layers, the labels are at the good position but with a bad font size. Here's my code to flatten :

UIGraphicsBeginImageContext(CGSizeMake(widthDocument,widthDocument));

for (UILabel *label in arrayLabel) {
    [label drawTextInRect:label.frame];
}

UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();

Anybody can help me ?

flatten uiimage uilabel objective-c iphone
6 Answers
extension UIImage {

    class func imageFrom(text: String, width: CGFloat, font: UIFont, textAlignment: NSTextAlignment, lineBreakMode: NSLineBreakMode) -> UIImage? {
        let label = UILabel(frame: CGRect(x: 0, y: 0, width: width, height: CGFloat.greatestFiniteMagnitude))
        label.text = text
        label.font = font
        label.textAlignment = textAlignment
        label.lineBreakMode = lineBreakMode

        label.sizeToFit()

        UIGraphicsBeginImageContextWithOptions(label.bounds.size, false, 0.0)
        label.layer.render(in: UIGraphicsGetCurrentContext()!)
        let img = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return img
    }

}

Using:

    let iv = UIImageView(image: UIImage.imageFrom(text: "Test For \nYarik", width: 537.0, font: UIFont.systemFont(ofSize: 30), textAlignment: .center, lineBreakMode: .byWordWrapping))
    iv.contentMode = .scaleAspectFit
user_18562730
Related