• iOS中的截屏(屏幕截屏及scrollView或tableView的全部截屏)


    iOS中的截屏(屏幕截屏及scrollView或tableView的全部截屏)

    2017.03.16 12:18* 字数 52 阅读 563评论 4喜欢 2

    1. 截取屏幕尺寸大小的图片并保存至相册

    保存至相册只需将方法saveImage中的代码替换即可

    UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, YES, 0.0);

    [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];

    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    2. scrollViewtableView的全部截屏并保存至相册

    - (void)saveImage {

        UIImage* viewImage = nil;

        UITableView *scrollView = self.tableView;

        UIGraphicsBeginImageContextWithOptions(scrollView.contentSize, scrollView.opaque, 0.0);

        {

            CGPoint savedContentOffset = scrollView.contentOffset;

            CGRect savedFrame = scrollView.frame;

            

            scrollView.contentOffset = CGPointZero;

            scrollView.frame = CGRectMake(0, 0, scrollView.contentSize.width, scrollView.contentSize.height);

            

            [scrollView.layer renderInContext: UIGraphicsGetCurrentContext()];

            viewImage = UIGraphicsGetImageFromCurrentImageContext();

            

            scrollView.contentOffset = savedContentOffset;

            scrollView.frame = savedFrame;

        }

        UIGraphicsEndImageContext();

        

        [self saveImageToPhotos:viewImage];

    }

    - (void)saveImageToPhotos:(UIImage*)savedImage {

        UIImageWriteToSavedPhotosAlbum(savedImage, self, @selector(image:didFinishSavingWithError:contextInfo:), NULL);

    }

    - (void)image: (UIImage *) image didFinishSavingWithError: (NSError *) error contextInfo: (void *) contextInfo {

        NSString *msg = nil ;

        if(error != NULL){

            msg = @"保存图片失败" ;

        }else{

            msg = @"保存图片成功" ;

        }

        UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"保存图片结果提示"

                                                        message:msg

                                                       delegate:self

                                              cancelButtonTitle:@"确定"

                                              otherButtonTitles:nil];

        [alert show];

    }

    + (UIImage *)screenshot
    {
        CGSize imageSize = CGSizeZero;
    
        UIInterfaceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;
        if (UIInterfaceOrientationIsPortrait(orientation)) {
            imageSize = [UIScreen mainScreen].bounds.size;
        } else {
            imageSize = CGSizeMake([UIScreen mainScreen].bounds.size.height, [UIScreen mainScreen].bounds.size.width);
        }
    
        UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0);
        CGContextRef context = UIGraphicsGetCurrentContext();
        for (UIWindow *window in [[UIApplication sharedApplication] windows]) {
            CGContextSaveGState(context);
            CGContextTranslateCTM(context, window.center.x, window.center.y);
            CGContextConcatCTM(context, window.transform);
            CGContextTranslateCTM(context, -window.bounds.size.width * window.layer.anchorPoint.x, -window.bounds.size.height * window.layer.anchorPoint.y);
            if (orientation == UIInterfaceOrientationLandscapeLeft) {
                CGContextRotateCTM(context, M_PI_2);
                CGContextTranslateCTM(context, 0, -imageSize.width);
            } else if (orientation == UIInterfaceOrientationLandscapeRight) {
                CGContextRotateCTM(context, -M_PI_2);
                CGContextTranslateCTM(context, -imageSize.height, 0);
            } else if (orientation == UIInterfaceOrientationPortraitUpsideDown) {
                CGContextRotateCTM(context, M_PI);
                CGContextTranslateCTM(context, -imageSize.width, -imageSize.height);
            }
            if ([window respondsToSelector:@selector(drawViewHierarchyInRect:afterScreenUpdates:)]) {
                [window drawViewHierarchyInRect:window.bounds afterScreenUpdates:YES];
            } else {
                [window.layer renderInContext:context];
            }
            CGContextRestoreGState(context);
        }
    
        UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();
        return image;
    }
    

    swift

    class func screenshot() -> UIImage {
        var imageSize = CGSizeZero
    
        let orientation = UIApplication.sharedApplication().statusBarOrientation
        if UIInterfaceOrientationIsPortrait(orientation) {
            imageSize = UIScreen.mainScreen().bounds.size
        } else {
            imageSize = CGSize( UIScreen.mainScreen().bounds.size.height, height: UIScreen.mainScreen().bounds.size.width)
        }
    
        UIGraphicsBeginImageContextWithOptions(imageSize, false, 0)
        let context = UIGraphicsGetCurrentContext()
        for window in UIApplication.sharedApplication().windows {
            CGContextSaveGState(context)
            CGContextTranslateCTM(context, window.center.x, window.center.y)
            CGContextConcatCTM(context, window.transform)
            CGContextTranslateCTM(context, -window.bounds.size.width * window.layer.anchorPoint.x, -window.bounds.size.height * window.layer.anchorPoint.y)
            if orientation == .LandscapeLeft {
                CGContextRotateCTM(context, CGFloat(M_PI_2))
                CGContextTranslateCTM(context, 0, -imageSize.width)
            } else if orientation == .LandscapeRight {
                CGContextRotateCTM(context, -CGFloat(M_PI_2))
                CGContextTranslateCTM(context, -imageSize.height, 0)
            } else if orientation == .PortraitUpsideDown {
                CGContextRotateCTM(context, CGFloat(M_PI))
                CGContextTranslateCTM(context, -imageSize.width, -imageSize.height)
            }
            if window.respondsToSelector("drawViewHierarchyInRect:afterScreenUpdates:") {
                window.drawViewHierarchyInRect(window.bounds, afterScreenUpdates: true)
            } else if let context = context {
                window.layer.renderInContext(context)
            }
            CGContextRestoreGState(context)
        }
    
        let image = UIGraphicsGetImageFromCurrentImageContext()
        UIGraphicsEndImageContext()
        return image
    }


    链接:https://www.jianshu.com/p/343387a9e5c0

    iOS应用内截图代码

    有待改写工具类?????

    2016.06.17 

    第一种方法(截全屏幕)

    下面这段代码可以将当前屏幕显示的内容截图放置相册中,需要导入

    -(void)viewDidAppear:(BOOL)animated

    {

    [superviewDidAppear:animated];

    self.view.backgroundColor= [UIColorgreenColor];

    UIWindow*screenWindow = [[UIApplicationsharedApplication]keyWindow];

    UIGraphicsBeginImageContext(screenWindow.frame.size);

    [screenWindow.layerrenderInContext:UIGraphicsGetCurrentContext()];

    UIImage* viewImage =UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    UIImageWriteToSavedPhotosAlbum(viewImage,nil,nil,nil);

    }

    第二种方法(自定义截图区域)

    #pragmamark -=====自定义截屏位置大小的逻辑代码=====-

    staticintScreenshotIndex=0; //

    -(void)ScreenShot{

    //这里因为我需要全屏接图所以直接改了,宏定义iPadWithd为1024,iPadHeight为768,

    //UIGraphicsBeginImageContextWithOptions(CGSizeMake(640, 960), YES, 0);//设置截屏大小

    UIGraphicsBeginImageContextWithOptions(CGSizeMake(iPadWidth, iPadHeight), YES,0);//设置截屏大小

    [[self.view layer] renderInContext:UIGraphicsGetCurrentContext()];

    UIImage *viewImage =UIGraphicsGetImageFromCurrentImageContext();

    UIGraphicsEndImageContext();

    CGImageRef imageRef =viewImage.CGImage;

    //CGRect rect = CGRectMake(166, 211, 426, 320);//这里可以设置想要截图的区域

    CGRect rect = CGRectMake(0,0, iPadWidth, iPadHeight);//这里可以设置想要截图的区域

    CGImageRef imageRefRect =CGImageCreateWithImageInRect(imageRef, rect);

    UIImage *sendImage =[[UIImage alloc] initWithCGImage:imageRefRect];

    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= [NSString stringWithFormat:@"screenShow_%d.png",ScreenshotIndex];

    NSString *savedImagePath =[documentsDirectory stringByAppendingPathComponent:pictureName];

    NSLog(@"截屏路径打印: %@", savedImagePath);

    //这里我将路径设置为一个全局String,这里做的不好,我自己是为了用而已,希望大家别这么写

    [self SetPickPath:savedImagePath];

    [imageViewData writeToFile:savedImagePath atomically:YES];//保存照片到沙盒目录

    CGImageRelease(imageRefRect);

    ScreenshotIndex++;

    }

    //设置路径

    - (void)SetPickPath:(NSString *)PickImage {

    _ScreenshotsPickPath =PickImage;

    }

    //获取路径<这里我就直接用于邮件推送的代码中去了,能达到效果,但肯定有更好的写法>

    - (NSString *)GetPickPath {

    return_ScreenshotsPickPath;

    }

    IOS获取设备屏幕代码(截屏)

    2016.07.18 09:38* 
     

    -(void) screenShot{

        

      UIGraphicsBeginImageContext(self.bounds.size);   //self为需要截屏的UI控件 即通过改变此参数可以截取特定的UI控件 

      [self.layer renderInContext:UIGraphicsGetCurrentContext()];    

      UIImage *image= UIGraphicsGetImageFromCurrentImageContext();

      UIGraphicsEndImageContext();    

      NSLog(@"image:%@",image); //至此已拿到image

      UIImageView *imaView = [[UIImageView alloc] initWithImage:image];   

      imaView.frame = CGRectMake(0, 700, 500, 500);    

      [self addSubview:imaView];    

        

      UIImageWriteToSavedPhotosAlbum(image, self, nil, nil);//把图片保存在本地

    }

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  • 原文地址:https://www.cnblogs.com/sundaysgarden/p/10335186.html
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