CoreImage：使用純色創建一個CIImage並將其顯示在NSImageView中

Question

我想以編程方式生成具有純色填充的矩形圖像。 我該怎麼做？ 我想用inputImage填充inputImageView。

這裏是我的代碼，到目前爲止，但我得到的是一個空的圖像視圖：

-(void) awakeFromNib{ 
    CIColor *red = [CIColor colorWithRed:1 green:0 blue:0]; 
    CIImage *redImage = [CIImage imageWithColor:red]; 

    NSCIImageRep *ir = [NSCIImageRep imageRepWithCIImage:redImage]; 

    [self setInputImage:[[NSImage alloc] initWithSize: NSMakeSize(25, 25)]]; 
    //magic should be happening right here! 
    [[self inputImage] addRepresentation:ir]; 
    [[self inputView] setImage:[self inputImage]]; 
    [inputView setNeedsDisplay:YES]; 
} 

Answer 1

NSImage *image = [[NSImage alloc] initWithSize:NSMakeSize(25, 25)]; 
[image lockFocus]; 
[[NSColor redColor] setFill]; 
[NSBezierPath fillRect:NSMakeRect(0, 0, 25, 25)]; 
[image unlockFocus];