如何在NSView上繪制NSImage？

Question

對於使用Objective C繪制圖像，我是一個新手。我已經在iPhone開發中完成了圖像繪制，但是現在我想在Mac上繪制圖像。 簡而言之，Mac相當於下面的iPhone代碼？

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

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

}

Answer 1

假設您不希望任何圖像透明度和構圖效果，這應該可以工作。

-(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];
}