#import "ViewController.h"#define WIDTH 50#define PHOTO_HEIGHT 150@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad{    [super viewDidLoad];    CALayer *layer=[CALayer layer];    layer.bounds=CGRectMake(0, 0, PHOTO_HEIGHT, PHOTO_HEIGHT);    layer.position=CGPointMake(160, 200);    layer.backgroundColor=[UIColor redColor].CGColor;    layer.cornerRadius=PHOTO_HEIGHT/2;    layer.masksToBounds=YES;        layer.borderColor=[UIColor whiteColor].CGColor;    layer.borderWidth=2;    layer.delegate=self;    [self.view.layer addSublayer:layer];    [layer setNeedsDisplay];                }-(void)drawLayer:(CALayer *)layer inContext:(CGContextRef)ctx{    CGContextSaveGState(ctx);    CGContextScaleCTM(ctx, 1, -1);    CGContextTranslateCTM(ctx, 0, -PHOTO_HEIGHT);    UIImage *image=[UIImage imageNamed:@"1"];    CGContextDrawImage(ctx, CGRectMake(0, 0, PHOTO_HEIGHT, PHOTO_HEIGHT), image.CGImage);    CGContextRestoreGState(ctx);}