如何在iOS中为UIImageView提供3D边框

Question

I want to provide a 3D just like the image posted here.

How can I do that? Any suggestions would be appreciated. Thanks in advance.

Before Shah's answer ![enter image description here][2]

After his answer ![enter image description here][3]

Answer 1

using coreGraphics use shadow. sample code for shadow is.

one imageview span entire view on viewcontroller.

in .h file @property CGContextRef context;

    #define radians(degrees) (degrees * M_PI/180)
      -(void) JustForYouShadow
 {
UIImage *image=[UIImage imageNamed:@"button.jpg"];
UIGraphicsBeginImageContext(self.view.frame.size);

[self.imgView.image drawInRect:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound);
context=UIGraphicsGetCurrentContext();
CGContextSetLineWidth(context, 2.0);
    //shadow for iBeacon
     CGSize  myShadowOffset = CGSizeMake (0.9,  15);
     CGContextSaveGState(context);
     CGContextSetShadow (context, myShadowOffset, 10);

     CGRect rectangle = CGRectMake(10,10,150,150);

     CGContextTranslateCTM( context, 90, 80 ) ;
     CGContextRotateCTM(context, radians(30));

     CGContextDrawImage(context, rectangle, image.CGImage);
     CGContextStrokePath(context);
     CGContextRestoreGState(context);
//get line on image
self.imgView.image = UIGraphicsGetImageFromCurrentImageContext();
[self.imgView setAlpha:1.0];
UIGraphicsEndImageContext();

 }

it's running fine, this is screen snap of simulator.