How can I add CGPoint objects to an NSArray the easy way?
Solution 1
With UIKit
Apple added support for CGPoint to NSValue
, so you can do:
NSArray *points = [NSArray arrayWithObjects:
[NSValue valueWithCGPoint:CGPointMake(5.5, 6.6)],
[NSValue valueWithCGPoint:CGPointMake(7.7, 8.8)],
nil];
List as many [NSValue] instances as you have CGPoint, and end the list in nil. All objects in this structure are auto-released.
On the flip side, when you're pulling the values out of the array:
NSValue *val = [points objectAtIndex:0];
CGPoint p = [val CGPointValue];
Solution 2
I use this:
Create array:
NSArray *myArray = @[[NSValue valueWithCGPoint:CGPointMake(30.0, 150.0)],[NSValue valueWithCGPoint:CGPointMake(41.67, 145.19)]];
Get 1st CGPoint object:
CGPoint myPoint = [myArray[0] CGPointValue];
Solution 3
You can also write this in a minimal form of:
CGPoint myArray[] = { CGPointMake(5.5, 6.6), CGPointMake(7.7, 8.8) };
CGPoint p2 = myArray[1];
Solution 4
Have you taken a look at CFMutableArray
? That might work better for you.
Thanks
I like to play guitar. Sometimes I need to develop software. But I hate it ;) I mean... it sucks. It really does. Well, not always. Oh, and I think I'm the guy with the most questions here.
Updated on May 17, 2020Comments
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Thanks about 4 years
I have about 50 CGPoint objects that describe something like a "path", and I want to add them to an NSArray. It's going to be a method that will just return the corresponding CGPoint for an given index. I don't want to create 50 variables like p1 = ...; p2 = ..., and so on. Is there an easy way that would let me to define those points "instantly" when initializing the NSArray with objects?
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Jarret Hardie about 15 yearsFor scalar types, have a look at NSNumber... you'll see constructors like numberWithBool: numberWithInteger: numberWithFloat:, numberWithUnsignedShort:, etc.
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Jim Dovey about 15 yearsAlternatively you can use NSValue directly: [NSValue valueWithBytes: &someStructSockaddr objCType: @encode(struct sockaddr)] for instance.