Reputation: 332
I want to assign more than one value to the variable. I have no idea how to do. Basically I want to put multiple texts on the image.
This is single assignment code(which is working fine):
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
ImageDisplay.image = textToImage("HERE IS FIRST LABEL", inImage: image, atPoint: CGPoint( x: 400, y: 300))
}
dismissViewControllerAnimated(true, completion: nil)
}
I just want to assign more value to the ImageDisplay.image. Here I can show an (wrong) example:
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
ImageDisplay.image = textToImage("HERE IS FIRST LABEL", inImage: image, atPoint: CGPoint( x: 400, y: 100))
ImageDisplay.image = textToImage("HERE IS SECOND LABEL", inImage: image, atPoint: CGPoint( x: 400, y: 200))
ImageDisplay.image = textToImage("HERE IS THIRD LABEL", inImage: image, atPoint: CGPoint( x: 400, y: 300))
}
dismissViewControllerAnimated(true, completion: nil)
}
This is textToImage function:
func textToImage(drawText: NSString, inImage: UIImage, atPoint:CGPoint)->UIImage{
// Setup the font specific variables
let textColor: UIColor = UIColor.blackColor()
let textFont: UIFont = UIFont(name: "Helvetica Bold", size: 200)!
//Setup the image context using the passed image.
UIGraphicsBeginImageContext(inImage.size)
//Setups up the font attributes that will be later used to dictate how the text should be drawn
let textFontAttributes = [
NSFontAttributeName: textFont,
NSForegroundColorAttributeName: textColor,
]
//Put the image into a rectangle as large as the original image.
inImage.drawInRect(CGRectMake(0, 0, inImage.size.width, inImage.size.height))
// Creating a point within the space that is as bit as the image.
let rect: CGRect = CGRectMake(atPoint.x, atPoint.y, inImage.size.width, inImage.size.height)
//Now Draw the text into an image.
drawText.drawInRect(rect, withAttributes: textFontAttributes)
// Create a new image out of the images we have created
let newImage: UIImage = UIGraphicsGetImageFromCurrentImageContext()
// End the context now that we have the image we need
UIGraphicsEndImageContext()
//And pass it back up to the caller.
return newImage
}
Upvotes: 1
Views: 146
Reputation: 27211
Your code mean this:
let a = textToImage("HERE IS FIRST LABEL", inImage: image, atPoint: CGPoint( x: 400, y: 100))
ImageDisplay.image = a
let b = textToImage("HERE IS SECOND LABEL", inImage: image, atPoint: CGPoint( x: 400, y: 200))
ImageDisplay.image = b
let c = textToImage("HERE IS THIRD LABEL", inImage: image, atPoint: CGPoint( x: 400, y: 300))
ImageDisplay.image = c
Your ImageDisplay.image
stores only the last data (c
variable)
Save a
and b
somewhere too to use them later.
or change textToImage
function to a new one.
EDIT THIS CODE WORKS (I HAVE TESTED IT):
//..somewhere
guard let img = UIImage(named:"telephone40.png") else {
return
}//UIImage.init()
// img.size = CGSizeMake(500,500)
var tmpImg = textToImage(["HERE IS FIRST LABEL","HERE IS SECOND LABEL","HERE IS THIRD LABEL"], inImage: img, atPoints: [CGPoint( x: 0, y: 10),CGPoint( x: 20, y: 30),CGPoint( x: 40, y: 50)])
//result <<<<
//function:
func textToImage(drawTexts: [NSString], inImage: UIImage, atPoints:[CGPoint])->UIImage{
// Setup the font specific variables
let textColor: UIColor = UIColor.blackColor()
let textFont: UIFont = UIFont(name: "Helvetica Bold", size: 200)!
//Setups up the font attributes that will be later used to dictate how the text should be drawn
let textFontAttributes = [
NSFontAttributeName: textFont,
NSForegroundColorAttributeName: textColor,
]
//Setup the image context using the passed image.
UIGraphicsBeginImageContext(inImage.size)
//Put the image into a rectangle as large as the original image.
inImage.drawInRect(CGRectMake(0, 0, inImage.size.width, inImage.size.height))
for i in 0..<drawTexts.count {
let drawText = drawTexts[i]
let atPoint = atPoints[i]
// Creating a point within the space that is as bit as the image.
let rect: CGRect = CGRectMake(atPoint.x, atPoint.y, inImage.size.width, inImage.size.height)
//Now Draw the text into an image.
drawText.drawInRect(rect, withAttributes: textFontAttributes)
}
// Create a new image out of the images we have created
let newImage: UIImage = UIGraphicsGetImageFromCurrentImageContext()
// End the context now that we have the image we need
UIGraphicsEndImageContext()
//And pass it back up to the caller.
return newImage
}
Upvotes: 0
Reputation: 874
Each time you call textToImage with "image" you are creating a new object with the provided string from the original image, but what you want is add the string to each previously build image. So you can do this :
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
if var image = info[UIImagePickerControllerOriginalImage] as? UIImage {
image = textToImage("HERE IS FIRST LABEL", inImage: image, atPoint: CGPoint( x: 400, y: 100))
image = textToImage("HERE IS SECOND LABEL", inImage: image, atPoint: CGPoint( x: 400, y: 200))
image = textToImage("HERE IS THIRD LABEL", inImage: image, atPoint: CGPoint( x: 400, y: 300))
ImageDisplay.image = image
}
dismissViewControllerAnimated(true, completion: nil)
}
Upvotes: 1
Reputation: 223
My guess would be to chain the calls to textToImage(...)
on a temporary UIImage
:
func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : AnyObject]) {
if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
var tmpImg = textToImage("HERE IS FIRST LABEL", inImage: image, atPoint: CGPoint( x: 400, y: 100))
tmpImg = textToImage("HERE IS SECOND LABEL", inImage: tmpImg, atPoint: CGPoint( x: 400, y: 200))
tmpImg = textToImage("HERE IS THIRD LABEL", inImage: tmpImg, atPoint: CGPoint( x: 400, y: 300))
ImageDisplay.image = tmpImg
}
dismissViewControllerAnimated(true, completion: nil)
}
Upvotes: 1