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. scrollView或tableView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(width: 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

}