Creating rounded ImageView in iOS app development

Implement CirclularLayer will form a rounded image  view



#import <QuartzCore/QuartzCore.h>

@interface CirclularLayer : CALayer

-(id)initWithImage:(NSString*)image WithFrame:(CGRect)frame;

@end

//

//  CirclularLayer.m

//  ImageViewFrameSample

//

//  Created by Mayu on 3/31/14.

//  Copyright (c) 2014 NCS. All rights reserved.

//

#import "CirclularLayer.h"

@implementation CirclularLayer

-(id)initWithImage:(NSString*)image WithFrame:(CGRect)frame{

    

    self=[super init];

    if (self) {

        

        self.cornerRadius = 16.0;

     

        self.borderWidth=4.0;

        self.borderColor = [UIColor darkGrayColor].CGColor;

        

        float heightOfImageLayer  = (CGFloat)frame.size.height;

        float widthOfImageLayer  = (CGFloat)frame.size.width;

        heightOfImageLayer = floorf(heightOfImageLayer);

        widthOfImageLayer=floorf(widthOfImageLayer);

        self.cornerRadius = heightOfImageLayer/2.0f;

        self.frame = CGRectMake(frame.origin.x, frame.origin.y, heightOfImageLayer, heightOfImageLayer);

        

        

        [CATransaction begin];

        [CATransaction setAnimationDuration:0];

        self.contents = (id)[self getImage:[UIImage imageNamed:image]].CGImage;

        [CATransaction commit];

        

        

    }

    

    return self;

}

-(UIImage*)getImage:(UIImage*)image{

    

    UIImage *finalImage = nil;

    UIGraphicsBeginImageContext(image.size);

    {

        CGContextRef ctx = UIGraphicsGetCurrentContext();

        CGAffineTransform trnsfrm = CGAffineTransformConcat(CGAffineTransformIdentity, CGAffineTransformMakeScale(1.0, -1.0));

        trnsfrm = CGAffineTransformConcat(trnsfrm, CGAffineTransformMakeTranslation(0.0, image.size.height));

        CGContextConcatCTM(ctx, trnsfrm);

        CGContextBeginPath(ctx);

        CGContextAddEllipseInRect(ctx, CGRectMake(0.0, 0.0, image.size.width, image.size.height));

        CGContextClip(ctx);

        CGContextDrawImage(ctx, CGRectMake(0.0, 0.0, image.size.width, image.size.height), image.CGImage);

        finalImage = UIGraphicsGetImageFromCurrentImageContext();

        UIGraphicsEndImageContext();

    }

    

    

    return finalImage;

    

}

@end