Processing of effects such as uiimage Scaling

// Proportional Scaling

-(Uiimage *) scaletosize :( uiimage *) IMG size :( cgsize) size {
// Create a bitmap Context
// Set it to the context currently in use
Uigraphicsbeginimagecontext (size );
// Draw an image of varying size
[Img drawinrect: cgrectmake (0, 0, size. Width, size. Height)];
// Create an image with the size changed from the current context
Uiimage * scaledimage = uigraphicsgetimagefromcurrentimagecontext ();
// Make the current context output from the stack
Uigraphicsendimagecontext ();
// Returns a new image with a changed size.
Return scaledimage;
}