CODEWITHSUNDEEP
macospdfcocoadrawquartz-graphics
Tomasz Szulc
Tomasz Szulc

Reputation: 4235

How to draw PDF Context in Cocoa

I'm trying to save PDF file with NSView objects. Here is implementation of Square class (subclass of NSView).

@implementation Square

- (id)initWithColor:(NSColor *)aColor;
{
if (self = [super init])
{
    self.frame = NSMakeRect(0, 0, 50, 50);
    self.color = aColor;
}
return self;
}

- (void)drawRect:(NSRect)dirtyRect
{
[self.color set];
NSRectFill(dirtyRect);

}

Here is part of implementation of my DrawView - sublcass of NSView

- (void)awakeFromNib
{
squareGroup = [[NSMutableArray alloc] init];
}

- (void)addSquare:(Square *)square
{
[squareGroup addObject:square];
[self addSubview:square];
}

- (void)drawRect:(NSRect)dirtyRect
{
[[NSColor whiteColor] set];
NSRectFill(dirtyRect);
}

I can click on button Red or Blue and add Square object with blue or red color and when i clicked Save i want to save White DrawView with Square objects on it. I can move Square objects on DrawView now so every single Square objects are on different places.

My saving method look like below (in DrawView class):

- (void)saveAsPDF
{
NSString *homeDirectory = NSHomeDirectory();
NSURL *fileURL = [NSURL fileURLWithPath:[homeDirectory stringByAppendingPathComponent:@"file.pdf"]];

CGRect mediaBox = self.bounds;
CGContextRef ctx = CGPDFContextCreateWithURL((__bridge CFURLRef)(fileURL), &mediaBox, NULL);

CGPDFContextBeginPage(ctx, NULL);

for (Square *square in squareGroup) {
    [square.layer renderInContext:ctx];
}

[self.layer renderInContext:ctx];

CGPDFContextEndPage(ctx);
CFRelease(ctx);
}

In result i've got only blank file in home directory.

What is wrong with my save method? How can i do it correclty?

Upvotes: 1

Views: 1426

Answers (1)

Rachel Gallen
Rachel Gallen

Reputation: 28553

there is a very helpful tutorial here that may help you

they suggest two ways: the first is this, but the second one is more comprehensive and is well worth a look.

(void)didEnd:(NSSavePanel *)sheet
returnCode:(int)code
saveFormat:(void *)saveType
{
if (code == NSOKButton)
{
    if (pageIt)
    {

    }
    else
    {
        NSRect r = [textView bounds];
        NSData *data = [textView dataWithPDFInsideRect:r];

        [data writeToFile:[sheet filename] atomically:YES];
    }
}
}

Upvotes: 2

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