How to change NSRect to CGRect?

Question

-(void)drawRect : (NSRect)rect 
{    
        imgRect.orgin = NSZeroPoint;

        imgRect.size = [appleImage size];

        drawRect = [self bounds];

        [appleRect drawInRect:appleRect     
                     fromRect:imgRect     
                     operation:NSCompositeSourceOver     
                     fraction:1.0];
        ...     
}

---

I'm trying this but it's not easy and driving me crazy.

How to change NSRect type code to CGRect type code ?

plz help!

ps. i already know.. NSRect -> CGRect , NSZeroPoint -> CGRectZero

Answer 1

Just use these 2 Cocoa (no iOS) functions:

CGRect NSRectToCGRect(NSRect nsrect);
NSRect NSRectFromCGRect(CGRect cgrect);

Have a look here to deepen the topic: http://cocoadev.com/CGRect

Answer 2

If you encounter this in iOS, such as with UIKeyboardFrameEndUserInfoKey, it's important to know that NSRect is a subclass of NSValue.

if let rectValue = notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue {
    let rect = rectValue.CGRectValue()
    // Use your CGRect
}

Answer 3

Assuming you're using Apple's Foundation and not GNUStep or something else odd...

---

Objective-C

NSRect is just a typedef of CGRect (NSGeometry.h line 26-ish), so you can simply use either in place of the other anywhere.

void takeCgRect(CGRect rect) {
    NSLog(@"A core graphics rectangle at %@ with size %@", NSStringFromCGPoint(rect.origin), NSStringFromCGSize(rect.size))
}


void takeNsRect(NSRect rect) {
    NSLog(@"A NeXTStep rectangle at %@ with size %@", NSStringFromPoint(rect.origin), NSStringFromSize(rect.size))
}


// ELSEWHERE:



NSRect nsTest1 = NSMakeRect(1, 2, 3, 4)
CGRect cgTest1 = CGRectMake(1, 2, 3, 4)
CGRect cgTest2 = CGRectMake(100, 200, 300, 400)

NSLog(@"%@", @(nsTest1 == cgTest1)) // 1


takeCgRect(nsTest1) // A core graphics rectangle at {1.0, 2.0} with size {3.0, 4.0}
takeNsRect(cgTest2) // A NeXTStep rectangle at {100.0, 200.0} with size {300.0, 400.0}

---

Swift

In Swift, NSRect is just a typealias of CGRect (NSGeometry.swift line 449-ish), so you can simply use either in place of the other anywhere.

let nsTest1 = NSRect(x: 1, y: 2, width: 3, height: 4)
let cgTest1 = CGRect(x: 1, y: 2, width: 3, height: 4)
let cgTest2 = CGRect(x: 100, y: 200, width: 300, height: 400)

print(nsTest1 == cgTest1) // true


func takeCgRect(_ rect: CGRect) {
    print("A core graphics rectangle at \(rect.origin) with size \(rect.size)")
}


func takeNsRect(_ rect: NSRect) {
    print("A NeXTStep rectangle at \(rect.origin) with size \(rect.size)")
}


takeCgRect(nsTest1) // A core graphics rectangle at (1.0, 2.0) with size (3.0, 4.0)
takeNsRect(cgTest2) // A NeXTStep rectangle at (100.0, 200.0) with size (300.0, 400.0)