SwiftSIQI

Warren Moore – Thirty Days of Metal

Great series of short articles introducing Apple's Metal framework.

• 2022-04-01: Day 1: Devices
• 2022-04-02: Day 2: Buffers
• 2022-04-03: Day 3: Commands
• 2022-04-04: Day 4: MTKView
• 2022-04-05: Day 5: Shaders
• 2022-04-06: Day 6: Pipelines

SwiftSIQI

+ (UIColor *)randomColor{
    CGFloat r = arc4random_uniform(256)/255.0;
    CGFloat g = arc4random_uniform(256)/255.0;
    CGFloat b = arc4random_uniform(256)/255.0;
    return [UIColor colorWithRed:r green:g blue:b alpha:1];
}

SwiftSIQI

class func randomColor() -> UIColor {
    let red = CGFloat(arc4random_uniform(255))/CGFloat(255.0)
    let green = CGFloat( arc4random_uniform(255))/CGFloat(255.0)
    let blue = CGFloat(arc4random_uniform(255))/CGFloat(255.0)
        
    return UIColor(red: red, green: green, blue: blue, alpha: 1)
}

SwiftSIQI

// Horizontal Constraints
myView.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true

// Vertical constraints
myView.bottomAnchor.constraint(equalTo: view.topAnchor, constant: 8).isActive=true

// Size-Based Constraints
myView.widthAnchor.constraint(equalToConstant: 50.0).isActive = true
myView.heightAnchor.constraint(equalTo:otherView.heightAnchor, multiplier: 2.0).isActive = true

SwiftSIQI

let time: NSTimeInterval = XXX
let delay = dispatch_time(DISPATCH_TIME_NOW, Int64(time * Double(NSEC_PER_SEC)))
dispatch_after(delay, dispatch_get_main_queue(), {
    //anythiny you want...
})

SwiftSIQI

- (void)setBackgroundColor:(UIColor *)backgroundColor forState:(UIControlState)state {
	[self setBackgroundImage:[UIButton imageWithColor:backgroundColor] forState:state];
}

+ (UIImage *)imageWithColor:(UIColor *)color {
	CGRect rect = CGRectMake(0.0f, 0.0f, 1.0f, 1.0f);
	UIGraphicsBeginImageContext(rect.size);
	CGContextRef context = UIGraphicsGetCurrentContext();

	CGContextSetFillColorWithColor(context, [color CGColor]);

SwiftSIQI

@implementation UIImage (Additions)

- (UIImage *)makeCircularImageWithSize:(CGSize)size withBorderWidth:(CGFloat)width
{
    // make a CGRect with the image's size
    CGRect circleRect = (CGRect) {CGPointZero, size};
    
    // begin the image context since we're not in a drawRect:
    UIGraphicsBeginImageContextWithOptions(circleRect.size, NO, 0);
    

SwiftSIQI

- (UIImage *)antiAlias
{
   CGFloat border = 1.0f;
   CGRect rect = CGRectMake(border, border, self.size.width-2*border, self.size.height-2*border);

   UIImage *img = nil;
   
   UIGraphicsBeginImageContext(CGSizeMake(rect.size.width,rect.size.height));
   [self drawInRect:CGRectMake(-1, -1, self.size.width, self.size.height)];
   img = UIGraphicsGetImageFromCurrentImageContext();