学步园

刚看到一个关于图片合成的帖子，感觉写的很好，提供了一个思路，但没时间尝试，就先转载过来，有时间了试试。

在台湾的论坛里看到了一个关于图片合成的帖子，本想下下来研究，怎奈还要积分！所以仿照代码自己写了一个发出来和大家共同研究。

1.创建一个基于View-base的的工程命名为CombineImages

2.看看Xcode自动生成的文件，然后选择class右键创建新的file文件命名为CombineImages

3.打开CombineImages.h修改代码如下：

@interface CombineImagesViewController : UIViewController {
        IBOutlet  UIImageView *ImageView1;
        IBOutlet  UIImageView *ImageView2;
        IBOutlet  UIImageView *newImageView;
}
@property (nonatomic, retain) UIImageView *ImageView1;
@property (nonatomic, retain) UIImageView *ImageView2;
@property (nonatomic, retain) UIImageView *newImageView;
- (IBAction) Combine2Images:(id)sender;
- (UIImage *)addImage:(UIImage *)image1 toImage:(UIImage *)image2;

4.打开CombineImages.m，修改并添加如下代码：

@synthesize ImageView1,ImageView2,newImageView;
- (IBAction)Combine2Images:(id)sender{
        newImageView.image = [self addImage:ImageView1.image toImage:ImageView2.image];
}
- (UIImage *)addImage:(UIImage *)image1 toImage:(UIImage *)image2{
        UIGraphicsBeginImageContext(image1.size);
        [image1 drawInRect:CGRectMake(0, 0, image1.size.width, image1.size.height)];
        [image2 drawInRect:CGRectMake(0, 0, image2.size.width, image2.size.height)];
        UIImage *resultingImage = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();
        return resultingImage;
}

- (void)viewDidLoad {
    [super viewDidLoad];
        ImageView1.image = [UIImage imageNamed:@"ImageView1.png"];
        ImageView2.image = [UIImage imageNamed:@"ImageView2.png"];
}
- (void)dealloc {
        [ImageView1 release];
        [ImageView2 release];
        [newImageView release];
    [super dealloc];
}

好了代码部分已经添加结束！

原文地址：http://www.devdiv.com/thread-45031-1-3.html