Is there a constant for the maximum CGFloat value?

Question

I need to create a CGSize to compute text height of an arbitrary text with arbitrary length. UIKit has this nice method -sizeWithFont:constrainedToSize: and my text is only constrained in width, but not in height.

For this, I need to set the maximum possible CGFloat for the height.

Is there a constant like "CGFloatMax"?

Answer 1

How about CGFLOAT_MAX?

Answer 2

CGSize size = CGSizeMake(CGFLOAT_MIN, CGFLOAT_MAX);

width = 0.0000000000000000000000000000000000000117549435, height = 3.40282347E+38

Answer 3

For those using Swift 2, you should use:

CGFloat.max

For those using Swift 3, you should use:

CGFloat.greatestFiniteMagnitude

Note that CGFloat.max was removed when Swift 3 came out, as reflected in the documentation.

Answer 4

In Swift 3.0, You can also use CGFloat(FLT_MAX), especially if you want to use it in other cases like zIndex, where CGFloat.greatestFiniteMagnitude will be out of range.

Answer 5

A CGFloat is just a float so you can safely use FLT_MAX from <float.h>.

EDIT: As others have now pointed out it looks like CGFLOAT_MAX is already defined for you so you should use that for consistency rather than FLT_MAX, even though they are the same thing on 32 bit platforms.

Answer 6

CGGeometry defines:

#define CGFLOAT_MAX FLT_MAX