I'm trying to calculate the width of a text and the same code I used
in the past in a drawRect routine in a view to its
UIGraphicsGetCurrentContext() isn't working. The main difference of
course is the context, in this case I created a bitmap context and the
code is basically this:
CGFloat fontSize = 20.0;
int cw = 500;
int ch = 50;
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceGray();
CGContextRef context = CGBitmapContextCreate(NULL, cw, ch, 8, cw,
colorSpace, kCGRenderingIntentDefault);
if(context == NULL){
NSLog(@"Paragraph couldn't create context!");
}
CGColorSpaceRelease(colorSpace);
CGContextSelectFont(context, "Helvetica", fontSize,
kCGEncodingMacRoman);
CGContextSetTextDrawingMode(context, kCGTextFill);
const char* textC = [str
cStringUsingEncoding:NSMacOSRomanStringEncoding];
int len = strlen(textC);
CGContextShowTextAtPoint(context, 0, 0, textC, len);
CGPoint pt = CGContextGetTextPosition(context);
CGContextRelease(context);
pt.x is 0.
I used a bitmap context because I didn't know how to create a
different one, isn't possible to write text on a bitmap context or I
am missing something else?
Thanks a lot for any help, chr
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