Draw text and add to a UIImage iOS 5/6

Question

I have a textbox, where i want the written text to be added to a UIImage.

How can i draw NSString to a UIImage?

I´ve searched, and found lots of examples, but non of them works. Xcode just gives me lots of errors.

Simply put, i want to draw a NSString to a UIimage. The UIImage should be the same size as a predefined UIImageView, and be placed in center.

Any ideas?

Answer 1

UIImage is not a subview of UIView, so you cant add a subview to it. Also NSString is not a subview of UIView. If you want to show things on the screen, they should inherit from UIView.

So try this:

Create a UIImageView - set its image property to be your UIImage instance.

Create a UILabel - set its text property to your NSString.

Add the UILabel as a subview of your UIImageView.

and finally add your UIImageView to your current view controllers view.

Answer 2

i think solution is here..i have used this method in one of my application here lbltext is the object of my label. this method creates new image with given text & return the object of new image with text.

-(UIImage *) drawText:(NSString*) text inImage:(UIImage*)image atPoint:(CGPoint)point 
{
    UIFont *font = lblText.font;
    UIGraphicsBeginImageContext(iv.frame.size);
    [image drawInRect:CGRectMake(0,0,iv.frame.size.width,iv.frame.size.height)];
    CGRect rect = CGRectMake(point.x,point.y,lblText.frame.size.width, lblText.frame.size.height);
    [lblText.textColor set];
    [text drawInRect:CGRectIntegral(rect) withFont:font]; 
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return newImage;
}

in your below comment you have passed iv.center as a point.. try manualy like this

CGPoint point;
point.x=30; // dynamicaly just for example lblText.frame.origin.x;
point.y=40; //lblText.frame.origin.y;

you have to call above method like this...

UIImage *img = [self drawText:@"Test String" inImage:originalImage atPoint:point];

here,img is another instace of UIImage for storing new image with text...after calling this method use img imager for your further use..

for example...

[newimageviewObj setImage:img];

i hope this will help you