Как добавить текст в UIImageView в Swift?

Question

У меня есть некоторые проблемы для редактирования UIImageView. Пользователь может вводить текст в виде изображения, затем он обрабатывает его, и после этого пользователь может просматривать это изображение с помощью текста.

Как это сделать?

Answer 1

Попробуйте следующие действия

func waterMarkedImage(waterMarkText:String, corner:WaterMarkCorner = .BottomRight, margin:CGPoint = CGPoint(x: 20, y: 20), waterMarkTextColor:UIColor = UIColor.whiteColor(), waterMarkTextFont:UIFont = UIFont.systemFontOfSize(20), backgroundColor:UIColor = UIColor.clearColor()) -> UIImage{ 

    let textAttributes = [NSForegroundColorAttributeName:waterMarkTextColor, NSFontAttributeName:waterMarkTextFont] 
    let textSize = NSString(string: waterMarkText).sizeWithAttributes(textAttributes) 
    var textFrame = CGRectMake(0, 0, textSize.width, textSize.height) 

    print(textSize.height) 

    var imageSize = self.size 
    imageSize = CGSize(width: imageSize.width, height: (imageSize.height+textSize.height)) 
    switch corner{ 
    case .TopLeft: 
     textFrame.origin = margin 
    case .TopRight: 
     textFrame.origin = CGPoint(x: imageSize.width - textSize.width - margin.x, y: margin.y) 
    case .BottomLeft: 
     textFrame.origin = CGPoint(x: margin.x, y: imageSize.height - textSize.height - margin.y) 
    case .BottomRight: 
     textFrame.origin = CGPoint(x: imageSize.width - textSize.width - margin.x, y: imageSize.height - textSize.height - margin.y) 
    case .Center: 
     textFrame.origin = CGPoint(x: imageSize.width/2 - textSize.width/2, y: imageSize.height - textSize.height - margin.y) 
    } 

    /// Start creating the image with water mark 
    //imageSize = CGSize(width: (imageSize.width+textSize.width), height: (imageSize.height+textSize.height)) 
    UIGraphicsBeginImageContext(imageSize) 
    self.drawInRect(CGRectMake(0, 0, imageSize.width, imageSize.height - textSize.height)) 
    NSString(string: waterMarkText).drawInRect(textFrame, withAttributes: textAttributes) 

    let waterMarkedImage = UIGraphicsGetImageFromCurrentImageContext() 
    UIGraphicsEndImageContext() 

    return waterMarkedImage 
} 

Answer 2

Я попробовал и получил решение для добавления текста внутри UIImageview.Below является Кодирующим

import UIKit 

class ViewController: UIViewController,UINavigationControllerDelegate, UIImagePickerControllerDelegate,UIGestureRecognizerDelegate{ 

@IBOutlet var imageViewText: UIImageView! 
var dynamicTextViewInsideImageView : UITextView! 
var strImageSelected : String! 
var picker = UIImagePickerController() 
var xValue = CGFloat() 
var yValue = CGFloat() 
override func viewDidLoad() { 
    super.viewDidLoad() 
    // Do any additional setup after loading the view, typically from a nib. 
    imageViewText.layer.cornerRadius = 5 
    imageViewText.layer.borderColor = UIColor.blueColor().CGColor 
    imageViewText.layer.borderWidth = 1 
    strImageSelected = "" 
} 

override func viewWillAppear(animated: Bool) 
{ 
    let tapRecognizer = UITapGestureRecognizer(target: self, action: Selector("imageTapped:")) 
    //Add the recognizer to your view. 
    imageViewText.userInteractionEnabled = true 
    tapRecognizer.numberOfTapsRequired = 1 
    imageViewText.addGestureRecognizer(tapRecognizer) 
} 


override func didReceiveMemoryWarning() { 
    super.didReceiveMemoryWarning() 
    // Dispose of any resources that can be recreated. 
} 

@IBAction func actionPickImage(sender: AnyObject) 
{ 
    var alert:UIAlertController=UIAlertController(title: "Choose Image", message: nil, preferredStyle: UIAlertControllerStyle.ActionSheet) 
    var cameraAction = UIAlertAction(title: "Camera", style: UIAlertActionStyle.Default) 
     { 
      UIAlertAction in 
      self.openCamera() 
    } 
    var gallaryAction = UIAlertAction(title: "Gallary", style: UIAlertActionStyle.Default) 
     { 
      UIAlertAction in 
      self.openGallary() 
    } 
    var cancelAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel) 
     { 
      UIAlertAction in 
    } 

    // Add the actions 
    picker.delegate = self 
    alert.addAction(cameraAction) 
    alert.addAction(gallaryAction) 
    alert.addAction(cancelAction) 
    self.presentViewController(alert, animated: true, completion: nil) 

} 


func openCamera() 
{ 
    if(UIImagePickerController .isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera)) 
    { 
     picker.sourceType = UIImagePickerControllerSourceType.Camera 
     self .presentViewController(picker, animated: true, completion: nil) 
    } 
    else 
    { 
     let alertWarning = UIAlertView(title:"Warning", message: "You don't have camera", delegate:nil, cancelButtonTitle:"OK", otherButtonTitles:"") 
     alertWarning.show() 
    } 
} 
func openGallary() 
{ 
    picker.sourceType = UIImagePickerControllerSourceType.PhotoLibrary 
    self.presentViewController(picker, animated: true, completion: nil) 
} 

//PickerView Delegate Methods 
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) 
{ 
    picker .dismissViewControllerAnimated(true, completion: nil) 
    imageViewText.image=info[UIImagePickerControllerOriginalImage] as? UIImage 
    strImageSelected = "ImagePicked" 
} 
func imagePickerControllerDidCancel(picker: UIImagePickerController) 
{ 
    println("picker cancel.") 
    strImageSelected = "" 
} 
//On the imageView you can add text(Only after you picked the image from Gallery or Camera) 
func imageTapped(gestureRecognizer: UITapGestureRecognizer) 
{ 
    if strImageSelected.isEmpty{ 
     println("Do not add the textview inside imageview as you have not picked the image from gallery or camera") 
    } 
    else 
    { 
     println("you picked the image successfully") 
     dynamicTextViewInsideImageView = UITextView(frame: CGRectMake(xValue,yValue,200,50)) 
     dynamicTextViewInsideImageView.backgroundColor = UIColor(red: 0.9, green: 0.9, blue:0.9, alpha: 1.0) 
     imageViewText.addSubview(dynamicTextViewInsideImageView) 
    } 

} 
//TouchEvent for Getting X,Y position once we touch inside the imageview 
override func touchesBegan(touches: NSSet, withEvent event: UIEvent) 
{ 
    if let touch = touches.anyObject() as? UITouch 
    { 
     let location = touch.locationInView(imageViewText) as CGPoint 
     println("the location.x is - \(location.x)") 
     println("the location.y is - \(location.y)") 
     xValue = location.x 
     yValue = location.y 
     println("the xValue is - \(xValue)") 
     println("the yValue is - \(yValue)") 
    } 

} 
}