How to convert an image to data in iphone

can anyone t开发者_JAVA百科ell me how to convert an image(PNG) to data in iphone

NSData* pictureData = UIImagePNGRepresentation(image);

here image is an UIImage object

NSData* pictureData = UIImagePNGRepresentation(image); // PNG conversion 
NSData* pictureData = UIImageJPEGRepresentation(image); //JPEG conversion

If you want to getdata from image from bundle then its similar just you specify the path for it. Below is the code to get data from your PNG image by this way.

NSString *path = [[NSBundle mainBundle] pathForResource:@"image" ofType:@"png"];
NSData *myData = [NSData dataWithContentsOfFile:path];