macOS Need help using drawAtPoint

[rand0m3r]

Hi, i'm trying to use this method for an NSAttributedString object. but when i go [object drawAtPoint], I get a warning that says there are two definitions of this method, and it is trying to use the one with the signature -(BOOL)drawAtPointNSPoint)aPoint which is not what I want. So how do I get it to use the -(void)drawAtPointNSPoint)aPoint one? thanks.

 

[robbieduncan]

What variable type is object?

If it's id then that may be the problem as both NSString and NSImage define a method with this name. Note that the correct one will actually be chosen at run time, but if you want to get rid of the warning try:

[((NSAttributedString *) object) drawAtPoint:aPoint];

This will allow the compiler to know the type of the object so which version method to call...

 

[rand0m3r]

i made a set of NSAttributedString objects and put it an NSMutableArray and then tried to get them back with objectAtIndex. So they should be (NSAttributedString *) already shouldn't they?

 

[robbieduncan]

The objects will be NSAtteributedString objects so it will work, but the signature of objectAtIndex: is:

-(id) objectAtIndex:(int) index

so objects returned via this are id until you cast them.

 

[rand0m3r]

hey thanks it compiles now. but how come the text doesn't get drawn??!

 

[kainjow]

Post some of your code for the drawing. Is the NSPoint valid? Is it being drawn within a drawRect: method?

 

[robbieduncan]

Check if you are in a flipped view. Drawing text at (0,0) in a flipped view (or is it non-flippd I can never remember) draws the text outside the view as the co-ordinate system starts in the top left and text drawAtPoint: specifies the bottom left corner of the text bounding box so it draws off the top of the view...

 

[rand0m3r]

it is a flipped view but i thought it would be within the bounds.

NSAttributedString *testString;
testString = [[NSAttributedString alloc] initWithString"Testing"];
[(NSAttributedString *) testString drawAtPoint:NSMakePoint(100, 100)];

has it got anything to do with putting my view in focus?

 

[robbieduncan]

How big is the view?
Where (in which method) is this code?
Why are you using an NSAttributedString without attributes?

 

[rand0m3r]

put it in the drawRect function and it worked!

 

[robbieduncan]

put it in the drawRect function and it worked!

Here's a good tip for future: put ALL code to draw views in drawRect or functions called from drawRect. Otherwise it won't draw

 

[rand0m3r]

ah ok. i had NSBezierPath code in initFrame so i thought drawAtPoint would work there too.