iOS 屏幕截图

最新推荐文章于 2024-11-20 15:31:41 发布

转载最新推荐文章于 2024-11-20 15:31:41 发布 · 664 阅读

本文深入探讨了iOS开发中Swift语言的核心应用，包括基本语法、数据类型、控制结构、函数、类与继承等关键概念，同时展示了如何利用Swift进行高效、安全的iOS应用程序开发。

 
        /** 
       
        *截图功能 
       
        */ 
       
        -(
        void
        )screenShot{  
       
        UIGraphicsBeginImageContextWithOptions(CGSizeMake(640, 960), YES, 0);  
       
        //设置截屏大小  
       
        [[self.view layer] renderInContext:UIGraphicsGetCurrentContext()];  
       
        UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();  
       
        UIGraphicsEndImageContext();  
       
        CGImageRef imageRef = viewImage.CGImage;  
       
        CGRect rect = CGRectMake(0, 0, 641, SCREEN_HEIGHT + 300);
        //这里可以设置想要截图的区域  
       
        CGImageRef imageRefRect =CGImageCreateWithImageInRect(imageRef, rect);  
       
        UIImage *sendImage = [[UIImage alloc] initWithCGImage:imageRefRect];  
       
        //以下为图片保存代码  
       
        UIImageWriteToSavedPhotosAlbum(sendImage, nil, nil, nil);
        //保存图片到照片库  
       
        NSData *imageViewData = UIImagePNGRepresentation(sendImage);  
       
        NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);  
       
        NSString *documentsDirectory = [paths objectAtIndex:0];  
       
        NSString *pictureName= @
        "screenShow.png"
        ;  
       
        NSString *savedImagePath = [documentsDirectory stringByAppendingPathComponent:pictureName];  
       
        [imageViewData writeToFile:savedImagePath atomically:YES];
        //保存照片到沙盒目录  
       
        CGImageRelease(imageRefRect);      
       
        //从手机本地加载图片  
       
        UIImage *bgImage2 = [[UIImage alloc]initWithContentsOfFile:savedImagePath];  
       
        }

2.UIScrollView截屏（一屏无法显示完整）

 
        /** 
       
        *截图 
       
        */ 
       
        - (
        void
        )screenShot{  
       
        UIImage* image = nil;  
       
        UIGraphicsBeginImageContext(m_scrollView.contentSize);  
       
        {  
       
        CGPoint savedContentOffset = m_scrollView.contentOffset;  
       
        CGRect savedFrame = m_scrollView.frame;  
       
        m_scrollView.contentOffset = CGPointZero;  
       
        m_scrollView.frame = CGRectMake(0, 0, m_scrollView.contentSize.width, m_scrollView.contentSize.height);        [m_scrollView.layer renderInContext: UIGraphicsGetCurrentContext()];  
       
        image = UIGraphicsGetImageFromCurrentImageContext();       
       
        m_scrollView.contentOffset = savedContentOffset;  
       
        m_scrollView.frame = savedFrame;  
       
        }  
       
        UIGraphicsEndImageContext();      
       
        if 
         (image != nil) {  
       
        NSLog(@
        "截图成功!"
        );  
       
        }  
       
        }