How do I draw a NSImage onto a NSView?

Question

I'm pretty new to drawing images in general with Objective C. I have done image drawing in iPhone development, but now I want to do so on a Mac. In short, what is the Mac equivalent of the iPhone code below?

- (void) drawRect: (CGRect) rect
{
    [super drawRect:rect];

    UIImage *anotherimage = [UIImage imageNamed:@"alert.png"];
    CGPoint imagepoint = CGPointMake(10,0);
    [anotherimage drawAtPoint:imagepoint];

}

lead_the_zeppelin · Accepted Answer · 2014-05-16T21:10:09.060

3

This should work, assuming you don't want any image transparency and composition effects.

-(void)drawRect:(NSRect)dirtyRect
{
    [super drawRect:dirtyRect];
    NSImage *anotherImage = [NSImage imageNamed:@"alert.png"];
    [anotherImage drawAtPoint:NSMakePoint(10,0) fromRect:rectToDrawImage operation:NSCompositeCopy fraction:1.0];
}

edited May 16 '14 at 21:10

answered Nov 03 '13 at 23:46

lead_the_zeppelin

2,017
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1

You probably know this, but you might want to move creation of the image out of **drawRect:** which has to be as clean and fast as possible. – lead_the_zeppelin Nov 03 '13 at 23:49
1

Thanks a lot. I needed to make a few changes, but it worked in the end. I added in NSMakeRect(0,0,[anotherImage size].width, [anotherImage size].height) – Scsm326 Nov 05 '13 at 22:53
NSImage does not have a "frame" property, or so says Xcode. – Will May 16 '14 at 18:18

How do I draw a NSImage onto a NSView?

1 Answers1