Creating the text as image..

Text as image

task : how to create the image from text in objective-c...

the call  :

sourceImage.image=[UIImage addText:sourceImage.image text:@"Spynet"];
    modifiedImage.image=[UIImage imageFromText:@"Spynet....."];

.h file:

#import <UIKit/UIKit.h>

@interface UIImage (MyImage)


+ (UIImage*)imageFromView:(UIView*)view;
+ (UIImage*)imageFromView:(UIView*)view scaledToSize:(CGSize)newSize;
+ (UIImage*)imageWithImage:(UIImage*)image scaledToSize:(CGSize)newSize;
+ (void)beginImageContextWithSize:(CGSize)size;
+ (UIImage *)croppedImage:(UIImage *)myImage :(CGRect)bounds;

//masking the image ....

+ (UIImage*) maskImage:(UIImage *)image withMask:(UIImage *)maskImage;


//image from text...
+ (UIImage *)addText:(UIImage *)img text:(NSString *)text1;
+(UIImage *)imageFromText:(NSString *)text;
@end

 .m file :

#import "UIImage+MyImage.h"

@implementation UIImage (MyImage)

+ (void)beginImageContextWithSize:(CGSize)size
{
    if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)]) {
        if ([[UIScreen mainScreen] scale] == 2.0) {
            UIGraphicsBeginImageContextWithOptions(size, YES, 2.0);
        } else {
            UIGraphicsBeginImageContext(size);
        }
    } else {
        UIGraphicsBeginImageContext(size);
    }
}

+ (void)endImageContext
{
    UIGraphicsEndImageContext();
}

+ (UIImage*)imageFromView:(UIView*)view
{
    [self beginImageContextWithSize:[view bounds].size];
    BOOL hidden = [view isHidden];
    [view setHidden:NO];
    [[view layer] renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    [self endImageContext];
    [view setHidden:hidden];
    return image;
}

+ (UIImage*)imageFromView:(UIView*)view scaledToSize:(CGSize)newSize
{
    UIImage *image = [self imageFromView:view];
    if ([view bounds].size.width != newSize.width ||
        [view bounds].size.height != newSize.height) {
        image = [self imageWithImage:image scaledToSize:newSize];
    }
    return image;
}

+ (UIImage*)imageWithImage:(UIImage*)image scaledToSize:(CGSize)newSize
{
    [self beginImageContextWithSize:newSize];
    [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
    [self endImageContext];
    return newImage;
}


+ (UIImage *)croppedImage:(UIImage *)myImage :(CGRect)bounds {
    CGImageRef imageRef = CGImageCreateWithImageInRect(myImage.CGImage, bounds);
    UIImage *croppedImage = [UIImage imageWithCGImage:imageRef];
    CGImageRelease(imageRef);
    CGSize asd =  croppedImage.size;
    return croppedImage;
}




+ (UIImage*) maskImage:(UIImage *)image withMask:(UIImage *)maskImage {
   
    CGImageRef maskRef = maskImage.CGImage;
   
    CGImageRef mask = CGImageMaskCreate(CGImageGetWidth(maskRef),
                                        CGImageGetHeight(maskRef),
                                        CGImageGetBitsPerComponent(maskRef),
                                        CGImageGetBitsPerPixel(maskRef),
                                        CGImageGetBytesPerRow(maskRef),
                                        CGImageGetDataProvider(maskRef), NULL, false);
   
    CGImageRef masked = CGImageCreateWithMask([image CGImage], mask);
   
    CGImageRelease(mask);
    CGImageRelease(maskRef);
    return [UIImage imageWithCGImage:masked];
   
}


+ (UIImage *)addText:(UIImage *)img text:(NSString *)text1
{
    int w = img.size.width;
    int h = img.size.height;
    //lon = h - lon;
    CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
    CGContextRef context = CGBitmapContextCreate(NULL, w, h, 8, 4 * w, colorSpace, kCGImageAlphaPremultipliedFirst);
   
    CGContextDrawImage(context, CGRectMake(0, 0, w, h), img.CGImage);
    CGContextSetRGBFillColor(context, 0.0, 0.0, 1.0, 1);
   
    char* text  = (char *)[text1 cStringUsingEncoding:NSASCIIStringEncoding];// "05/05/09";
    CGContextSelectFont(context, "Arial", 18, kCGEncodingMacRoman);
    CGContextSetTextDrawingMode(context, kCGTextFill);
    CGContextSetRGBFillColor(context, 255, 255, 255, 1);
   
   
    //rotate text
    CGContextShowTextAtPoint(context, 0, 5, text, strlen(text));
   
   
    CGImageRef imageMasked = CGBitmapContextCreateImage(context);
    CGContextRelease(context);
    CGColorSpaceRelease(colorSpace);
   
    return [UIImage imageWithCGImage:imageMasked];
}


+(UIImage *)imageFromText:(NSString *)text
{
    CGSize maximumSize = CGSizeMake(300, 1000); //set width for string to wrap.
    UIFont *font = [UIFont boldSystemFontOfSize:16];
    CGSize strSize = [text sizeWithFont:font constrainedToSize:maximumSize lineBreakMode:UILineBreakModeWordWrap];
    if (UIGraphicsBeginImageContextWithOptions != NULL)
        UIGraphicsBeginImageContextWithOptions(strSize,NO,0.0);
    else
        // iOS is < 4.0
        UIGraphicsBeginImageContext(strSize);
   
    CGRect newframe = CGRectMake(0, 0, strSize.width, strSize.height);
    [text  drawInRect:newframe
             withFont:font
        lineBreakMode:UILineBreakModeWordWrap
            alignment:UITextAlignmentLeft];
    UIImage *testImg = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();   
    return testImg;
}


@end

use this file  and cloud link will be...