arrays can't contain nil.
The NSArray class contains a number of methods specifically designed to ease the creation and manipulation of arrays within Objective-C programs. Unlike some object oriented programming languages (C# being one example), the objects contained in an array do not all have to be of the same type.
An object representing a static ordered collection, for use instead of an Array constant in cases that require reference semantics.
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];
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];
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];
Have you taken a look at CFMutableArray
? That might work better for you.
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