Need to take photo from the application with date and time the photo has been taken to be displayed in photo just like digital camera.
-(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
CGContextSetTextMatrix(context, CGAffineTransformMakeRotation( -M_PI/4 ));
CGContextShowTextAtPoint(context, 4, 52, text, strlen(text));
CGImageRef imageMasked = CGBitmapContextCreateImage(context);
CGContextRelease(context);
CGColorSpaceRelease(colorSpace);
return [UIImage imageWithCGImage:imageMasked];
}
Related
I have created a Google map view where I am setting markers on their respective positions and and adding some text over them. Now I want to change size of that text as per zoom, means that size should be bigger on zoom out and lesser on map zoom in. How to achieve the same ? I tried different logic but failed. I am creating that marker text using following function,
// Add text to UIImage
-(UIImage *)addText:(UIImage *)img text:(NSString *)text1 red:(int)red green:(int)green blue:(int)blue alpha:(float)Alpha{
int w = img.size.width;
int h = img.size.height;
//lon = h - lon;
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGBitmapInfo bitmapInfo = (CGBitmapInfo) kCGImageAlphaPremultipliedFirst;
CGContextRef context = CGBitmapContextCreate(NULL, w, h, 8, 4 * w, colorSpace, bitmapInfo);
CGContextDrawImage(context, CGRectMake(0, 0, w, h), img.CGImage);
char * text = (char *)[text1 cStringUsingEncoding:NSASCIIStringEncoding];
//Here I set size of text
CGContextSelectFont(context, "HelveticaNeue-Bold", 15, kCGEncodingMacRoman);
CGContextSetTextDrawingMode(context, kCGTextFill);
CGContextSetTextDrawingMode(context, kCGTextInvisible);
CGContextShowTextAtPoint(context, 0, 0, text, strlen(text));
// Then get the position of the text and set the mode back to visible:
CGPoint pt = CGContextGetTextPosition(context);
CGContextSetTextDrawingMode(context, kCGTextFill);
CGContextSetRGBFillColor(context, 0, 0, 0, 1); // black - for shadow
CGContextShowTextAtPoint(context, (w/2) - (pt.x / 2) + 1, h/2, text, strlen(text));
CGContextSetRGBFillColor(context, red, green, blue, Alpha); // white - for text
CGContextShowTextAtPoint(context, (w/2) - (pt.x / 2), h/2, text, strlen(text));
CGImageRef imageMasked=nil;
imageMasked = CGBitmapContextCreateImage(context);
CGContextRelease(context);
CGColorSpaceRelease(colorSpace);
return [UIImage imageWithCGImage:imageMasked];
} // addText
I have this code that renders a custom slidebar handle with a dynamic text inside.
The problem is that I cannot get it to scale to retina resolution. It draws right on all devices and has the right size, but the resolution is low on retina.
How do I change this code to double the end image resolution?
-(UIImage *)addText:(UIImage *)img{
int w = img.size.width;
int h = img.size.height;
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef context = CGBitmapContextCreate(NULL, w, h, 8, 0, colorSpace,kCGImageAlphaPremultipliedFirst);
CGContextDrawImage(context, CGRectMake(0, 0, w, h), img.CGImage);
char* text= (char *)[[NSString stringWithFormat:#"$%d", (int)betSlider.value * 5] cStringUsingEncoding:NSASCIIStringEncoding];
CGContextSetShouldAntialias(context, true);
CGContextSelectFont(context, "TimesNewRomanPS-BoldMT",mainFrame.size.width/22, kCGEncodingMacRoman);
CGContextSetTextDrawingMode(context, kCGTextFill);
CGContextSetRGBFillColor(context,255,255,255, 1);
CGContextShowTextAtPoint(context,(img.size.width-(strlen(text)*strlen(text)*(img.size.width/27)))/2.5,img.size.width/2.5,text, strlen(text));
CGImageRef imgCombined = CGBitmapContextCreateImage(context);
CGContextRelease(context);
CGColorSpaceRelease(colorSpace);
UIImage *retImage = [UIImage imageWithCGImage:imgCombined];
CGImageRelease(imgCombined);
return retImage;
}
Change creating context like this:
CGFloat scale = [[UIScreen mainScreen] scale]
CGContextRef context = CGBitmapContextCreate(NULL, w * scale, h * scale, 8, 0, colorSpace,kCGImageAlphaPremultipliedFirst);
You can get Retina Image from current context using screen's scale.
Here is solution for Swift.
Swift 3
func getImageFromContext() -> UIImage{
UIGraphicsBeginImageContextWithOptions(self.frame.size, false, UIScreen.main.scale)
self.drawHierarchy(in: self.bounds, afterScreenUpdates: true)
self.layer.render(in: UIGraphicsGetCurrentContext()!)
let image = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
return image!
}
as CGContextShowTextAtPoint is deprecated in iOS 7, i would like to change CGContextShowTextAtPoint to drawAtPoint but the text is outputting.
//Add text to UIImage
-(UIImage *)addText:(UIImage *)img text:(NSString *)text1{
int w = 32;
int h = 32;
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef context = CGBitmapContextCreate(NULL, w, h, 8, 4 * w, colorSpace, (CGBitmapInfo)kCGImageAlphaPremultipliedFirst);
CGContextDrawImage(context, CGRectMake(0, 0, w, h), img.CGImage);
//char* text= (char *)[text1 cStringUsingEncoding:NSASCIIStringEncoding];
CGContextSetTextDrawingMode(context, kCGTextFill);
CGContextSetRGBFillColor(context, 0, 0, 0, 1);
// CGContextSelectFont(context, "Montserrat-Regular",12, kCGEncodingMacRoman);
// CGContextShowTextAtPoint(context,9,12,text, strlen(text));
//
[text1 drawAtPoint:CGPointMake(0, 0) withFont:[UIFont fontWithName:#"Montserrat-Regular" size:12]];
CGImageRef imgCombined = CGBitmapContextCreateImage(context);
CGContextRelease(context);
CGColorSpaceRelease(colorSpace);
UIImage *retImage = [UIImage imageWithCGImage:imgCombined];
CGImageRelease(imgCombined);
return retImage;
}
ok got it work on
//Add text to UIImage
-(UIImage *)addText:(UIImage *)img text:(NSString *)text1
{
UIGraphicsBeginImageContext(CGSizeMake(36, 36));
CGRect aRectangle = CGRectMake(0,0, 36.0f,36.0f);
[img drawInRect:aRectangle];
[text1 drawInRect : CGRectMake(0, 10, 36, 36)
withFont : [UIFont fontWithName:#"Montserrat-Regular" size:12]
lineBreakMode : NSLineBreakByTruncatingTail
alignment : NSTextAlignmentCenter ];
UIImage *theImage=UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return theImage;
}
I have taken screenshot programmatically for a scroll view in xcode. But the problem i am facing is, i need to take screenshot along with present date in it. Please help me.
Before taking screenshot, put one label with current date, and remove it after taking screenshot.
Or you could use the EXIF meta data to record the date (it's probably already in there). I guess an embedded date in the image is harder to fake, though.
This is how you can add a text to an image. Try this with the date as string. Once you taken the screenshot pass it to the below method and use the output image. Modify the below method for your convenience.
//Add text to UIImage
-(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
CGContextSetTextMatrix(context, CGAffineTransformMakeRotation( -M_PI/4 ));
CGContextShowTextAtPoint(context, 4, 52, text, strlen(text));
CGImageRef imageMasked = CGBitmapContextCreateImage(context);
CGContextRelease(context);
CGColorSpaceRelease(colorSpace);
return [UIImage imageWithCGImage:imageMasked];
}
Source
I know it is possible to have rounded corners on objects like a UIImageView (I have done it before). But in this case, I need to have my square UIImage to have rounded corners. I know it is more difficult than just doing it to an object but I need this specifically for the UIImage.
Can anyone share a method that is not static and can be implemented in a class that I already made?
I have to do this to a UIImage unless it is possible to add rounded edges to a CCSprite.
Thanks!
Edit2:
void addRoundedRectToPath(CGContextRef context, CGRect rect, float ovalWidth, float ovalHeight)
{
float fw, fh;
if (ovalWidth == 0 || ovalHeight == 0) {
CGContextAddRect(context, rect);
return;
}
CGContextSaveGState(context);
CGContextTranslateCTM (context, CGRectGetMinX(rect), CGRectGetMinY(rect));
CGContextScaleCTM (context, ovalWidth, ovalHeight);
fw = CGRectGetWidth (rect) / ovalWidth;
fh = CGRectGetHeight (rect) / ovalHeight;
CGContextMoveToPoint(context, fw, fh/2);
CGContextAddArcToPoint(context, fw, fh, fw/2, fh, 1);
CGContextAddArcToPoint(context, 0, fh, 0, fh/2, 1);
CGContextAddArcToPoint(context, 0, 0, fw/2, 0, 1);
CGContextAddArcToPoint(context, fw, 0, fw, fh/2, 1);
CGContextClosePath(context);
CGContextRestoreGState(context);
}
-(UIImage *)makeRoundCornerImage : (UIImage*) img : (int) cornerWidth : (int) cornerHeight
{
UIImage * newImage = nil;
if( nil != img)
{
NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init];
int w = img.size.width;
int h = img.size.height;
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef context = CGBitmapContextCreate(NULL, w, h, 8, 4 * w, colorSpace, kCGImageAlphaPremultipliedFirst);
CGContextBeginPath(context);
CGRect rect = CGRectMake(0, 0, img.size.width, img.size.height);
addRoundedRectToPath(context, rect, cornerWidth, cornerHeight);
CGContextClosePath(context);
CGContextClip(context);
CGContextDrawImage(context, CGRectMake(0, 0, w, h), img.CGImage);
CGImageRef imageMasked = CGBitmapContextCreateImage(context);
CGContextRelease(context);
CGColorSpaceRelease(colorSpace);
[img release];
newImage = [[UIImage imageWithCGImage:imageMasked] retain];
CGImageRelease(imageMasked);
[pool release];
}
return newImage;
}
Use https://stackoverflow.com/a/8125604/412916 to clip with a UIBezierPath instead. It's simpler.
Using the code posted above from http://blog.sallarp.com/iphone-uiimage-round-corners/
// rounded corner 10x10
UIImage *original = [UIImage imageNamed:#"original.png"];
UIImage *rounded = [self makeRoundCornerImage:original :10 :10];