MAi Objective-C CALayer category file

CALayer+MAi.h

//
//  CALayer+MAi.h
//
//  Created by User on 31/07/17.
//  Copyright © 2017 Mathi Arasan. All rights reserved.
//

#import <QuartzCore/QuartzCore.h>
#import <UIKit/UIKit.h>

/*!
 * @abstract Categories class for CALayer
 * @discussion Draw border layer with default or custom frame and color
 */
@interface CALayer (MAi)

/*!
 * A really simple way to draw layer with default color and frame.
 * @abstract Instance class fucntion for CALayer
 * @brief By default (Like in UITableViewSeparator) layer color with top possition
 * @discussion Color: lightGrayColor
 * @discussion Frame: X = 0, Y = 0, Width = Screen width, Height = 1
 * @return _Nonnull CALayer
 * @code [view.layer addSublayer:[CALayer drawTopLayerWithDefaultColorAndFullWidth]];
 */
+(CALayer *_Nonnull)drawTopLayerWithDefaultColorAndFullWidth;

/*!
 * A really simple way to draw layer with default color and custom frame.
 * @abstract Instance class fucntion for CALayer
 * @brief By default (Like in UITableViewSeparator) layer color with custom frame
 * @discussion Color: lightGrayColor
 * @param frame: CGRect frame (non CGRectZero)
 * @return _Nonnull CALayer
 * @code [view.layer addSublayer:[CALayer drawLayerWithDefaultColorAndCustomFrame:CGRectMake(x, y, width, height)]];
 */
+(CALayer *_Nonnull)drawLayerWithDefaultColorAndCustomFrame:(CGRect)frame;

/*!
 * A really simple way to draw layer with custom color and default frame.
 * @abstract Instance class fucntion for CALayer
 * @brief By default (Like in UITableViewSeparator) layer custom color with default frame
 * @discussion Frame: X = 0, Y = 0, Width = Screen width, Height = 1
 * @param color: _Nonnull UIColor
 * @return _Nonnull CALayer
 * @code [view.layer addSublayer:[CALayer drawTopLayerWithFullWidthAndCustomColor:[UIColor greenColor]];
 */
+(CALayer *_Nonnull)drawTopLayerWithFullWidthAndCustomColor:(UIColor *_Nonnull)color;

/*!
 * A really simple way to draw layer with custom color and custom frame.
 * @abstract Instance class fucntion for CALayer
 * @brief By default (Like in UITableViewSeparator) layer custom color with custom frame
 * @param color: _Nonnull UIColor
 * @param frame: CGRect frame (non CGRectZero)
 * @return _Nonnull CALayer
 * @code [view.layer addSublayer:[CALayer drawTopLayerWithCustomColor:[UIColor greenColor] customFrame:CGRectMake(x, y, width, height)]];
 */
+(CALayer *_Nonnull)drawTopLayerWithCustomColor:(UIColor *_Nonnull)color customFrame:(CGRect)frame;

/*!
 * A really simple way to draw back button image '<'
 * @abstract Instance class fucntion for CALayer
 * @brief By default (Like in apple back button image) '<' with custom color
 * @warinig Layer super view should be in width and height = 44.0
 * @return _Nonnull CALayer
 * @code [button addSublayer:[CALayer drawBackButtonLayerWithColor:[UIColor whiteColor]]];
 */
+(CALayer *_Nonnull)drawBackButtonLayerWithColor:(UIColor *_Nonnull)color;

/*!
 * A really simple way to retrive layer based on name search
 * @abstract Instance class fucntion for CALayer
 * @discussion  Search in the view and retrive layer equivalent to given name
 * @warinig Layer super view should be in width and height = 44.0
 * @param layerName: _Nonnull layer name
 * @param aView: _Nonnull layer superview
 * @return _Nullable CALayer
 * @code CALayer *aLayer = [CALayer retriveLayerFromName:@"layerName" forView:layerSuperView];
 */
+(CALayer *_Nullable)retriveLayerFromName:(NSString *_Nonnull)layerName forView:(UIView *_Nonnull)aView;

/*!
 * @brief Make layer with corner radius with custom value
 * @param value: Layer radius value
 * @return _Nullable CALayer
 * @code [view.layer makeCornerRadiusValue:4.];
 */
-(CALayer *_Nonnull)makeCornerRadiusValue:(CGFloat)value;

@end

CALayer+MAi.m

//
//  CALayer+MAi.m
//
//  Created by User on 31/07/17.
//  Copyright © 2017 Mathi Arasan. All rights reserved.
//

#import "CALayer+MAi.h"

@implementation CALayer (MAi)

#pragma mark - CALayer

+(CALayer *_Nonnull)drawTopLayerWithDefaultColorAndFullWidth
{
    return [self drawLayerWithColor:[UIColor lightGrayColor] frame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, 1)];
}

+(CALayer *_Nonnull)drawLayerWithDefaultColorAndCustomFrame:(CGRect)frame
{
    return [self drawLayerWithColor:[UIColor lightGrayColor] frame:frame];
}

+(CALayer *_Nonnull)drawTopLayerWithFullWidthAndCustomColor:(UIColor *_Nonnull)color
{
    return [self drawLayerWithColor:color frame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, 1)];
}

+(CALayer *_Nonnull)drawTopLayerWithCustomColor:(UIColor *_Nonnull)color customFrame:(CGRect)frame
{
    return  [self drawLayerWithColor:color frame:frame];
}

+(CALayer *_Nonnull)drawLayerWithColor:(UIColor *_Nonnull)color frame:(CGRect)frame
{
    CALayer *customLayer = [CALayer layer];
    customLayer.backgroundColor = color.CGColor;
    customLayer.frame = frame;
    return  customLayer;
}

+(CALayer *_Nonnull)drawBackButtonLayerWithColor:(UIColor *_Nonnull)color
{
    CGFloat backButtonHeightAndWidth = 44.;
    CGFloat midValue = (backButtonHeightAndWidth)/2.;
    CGFloat fourOfValue = (backButtonHeightAndWidth)/4;
    UIColor *shapeColor = [UIColor whiteColor];
    CAShapeLayer *shapeLayer = [CAShapeLayer layer];
    UIBezierPath *bezierPath = [UIBezierPath bezierPath];
    [bezierPath moveToPoint:CGPointMake(midValue, fourOfValue)];
    [bezierPath addLineToPoint:CGPointMake(fourOfValue, midValue)];
    [bezierPath addLineToPoint:CGPointMake(midValue, midValue + fourOfValue)];
    [shapeColor setStroke];
    [bezierPath stroke];
    shapeLayer.lineWidth = 3.;
    shapeLayer.lineJoin = kCALineJoinRound;
    shapeLayer.path = bezierPath.CGPath;
    shapeLayer.backgroundColor = [UIColor clearColor].CGColor;
    shapeLayer.fillColor = [UIColor clearColor].CGColor;
    shapeLayer.strokeColor = color.CGColor;
    return shapeLayer;
}

+(CALayer *_Nullable)retriveLayerFromName:(NSString *_Nonnull)layerName forView:(UIView *_Nonnull)aView
{
    for (CALayer *layer in aView.layer.sublayers)
    {
        if ([layer.name isEqualToString:layerName]) {
            return layer;
        }
    }
    
    return nil;
}

-(CALayer *_Nonnull)makeCornerRadiusValue:(CGFloat)value
{
    self.masksToBounds = YES;
    self.cornerRadius = 4.;
    self.contentsScale = [[UIScreen mainScreen] scale];
    return self;
}

@end