Xtykutl

I try to use this solution to build a gradient circle by @Johnny Rockex on macOS.But I got some problems.

In the @Johnny Rockex original answer

//3.1 setup

UIBezierPath * bezierPath;

CGPoint center = CGPointMake(dimension/2, dimension/2);



UIGraphicsBeginImageContextWithOptions(CGSizeMake(dimension, dimension), true, 0.0);

UIRectFill(CGRectMake(0, 0, dimension, dimension));

this method is provided by UIKit rather than AppKit. So I use some methods by AppKit

NSImage *contentView  =[[NSImage alloc]initWithSize:NSMakeSize(dimension, dimension)];



[contentView lockFocus];

[NSGraphicsContext currentContext].imageInterpolation = NSImageInterpolationNone;

CGContextRef gc = [[NSGraphicsContext currentContext]CGContext];

NSRectFill(CGRectMake(0, 0, dimension, dimension));



//fill Colors in bazierPath

for (int n = 0; n<numberOfColors;n++) {

   ...

}





[contentView unlockFocus];

[radialGradient setImage:contentView];

Unfortunately, I got a weird result at last

My colors array and bazierPath is correct but only a little part of the image has color.
Maybe is not caused by the title despection but I can not find any clue in other parts of codes.

Unlike UIBezierPath, appendBezierPathWithArcWithCenter is measured in degrees.