iOS 图片拼接技术

 

 

- (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;

}