合成图片的两种方法，思路都是一样的

- (void)viewDidLoad {

[super viewDidLoad];

CGRect frame= CGRectMake(520, 280, 320, 480);

CGImageRef small;

small= CGImageCreateWithImageInRect([[UIImage imageNamed:@"3.png"] CGImage],frame);

UIImageView *test=[[UIImageView alloc] initWithImage:[UIImage imageWithCGImage:small]];

[self.view addSubview:test];

[test release];

}

合成图片的两种方法，思路都是一样的

// Image＋Image ICON

- (UIImage *)addImage:(UIImageView *)image1 toImage:(UIImageView *)image2 {

CGSize size= CGSizeMake( image1.frame.size.width,image1.frame.size.height);

UIGraphicsBeginImageContext(size);

// Draw image1

[image2.image drawInRect:CGRectMake(6, 6,
image2.frame.size.width, image2.frame.size.height)];

// Draw image2

[image1.image drawInRect:CGRectMake(0, 0,
image1.frame.size.width, image1.frame.size.height)];

UIImage *resultingImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return resultingImage;

}

- (UIImage *)addImageview:(UIImage *)image1 toImage:(UIImage *)image2 {

CGSize size= CGSizeMake( image1.size.width,image1.size.height);

UIGraphicsBeginImageContext(size);

// Draw image1

[image2 drawInRect:CGRectMake(4.5, 6, 77, 77)];

// Draw image2

[image1 drawInRect:CGRectMake(0, 0, image1.size.width,
image1.size.height)];

UIImage *resultingImage = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return resultingImage;

}