【代碼筆記】截屏功能,代碼筆記截屏

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【代碼筆記】截屏功能,代碼筆記截屏

代碼:

- (void)viewDidLoad{    [super viewDidLoad];    // Do any additional setup after loading the view.        //初始化介面    [self addView];    }#pragma -mark -functions//初始化介面-(void)addView{    UIImage *image = [self screenshot:UIDeviceOrientationPortrait                             isOpaque:YES                 usePresentationLayer:YES];        UIImageView *imageView=[[UIImageView alloc]initWithFrame:CGRectMake(50, 100, 200, 200)];    imageView.backgroundColor=[UIColor redColor];    imageView.image=image;    [self.view addSubview:imageView];}//截屏功能- (UIImage *)screenshot:(UIDeviceOrientation)orientation isOpaque:(BOOL)isOpaque usePresentationLayer:(BOOL)usePresentationLayer{    CGSize size;        if (orientation == UIDeviceOrientationPortrait || orientation == UIDeviceOrientationPortraitUpsideDown) {        size = CGSizeMake(self.view.frame.size.width, self.view.frame.size.height);    } else {        size = CGSizeMake(self.view.frame.size.height, self.view.frame.size.width);    }        UIGraphicsBeginImageContextWithOptions(size, isOpaque, 0.0);        if (usePresentationLayer) {        [self.view.layer.presentationLayer renderInContext:UIGraphicsGetCurrentContext()];    } else {        [self.view.layer renderInContext:UIGraphicsGetCurrentContext()];    }        UIImage *image = UIGraphicsGetImageFromCurrentImageContext();        UIGraphicsEndImageContext();        return image;}

 

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