iOS 获取屏幕某个区域的截图-b

-(void)fullScreenshots{

UIWindow *screenWindow = [[UIApplicationsharedApplication] keyWindow];

UIGraphicsBeginImageContext(screenWindow.frame.size);//全屏截图，包括window

[screenWindow.layerrenderInContext:UIGraphicsGetCurrentContext()];

UIImage *viewImage =UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

//    UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);

float originX =_sampleView.frame.origin.x;

float originy =_sampleView.frame.origin.y;

float width =_sampleView.frame.size.width;

float height =_sampleView.frame.size.height;

//你需要的区域起点,宽,高;

CGRect rect1 =CGRectMake(originX , originy , width , height);

UIImage * imgeee = [UIImageimageWithCGImage:CGImageCreateWithImageInRect([viewImageCGImage], rect1)];

UIImageView *snapImg = [[UIImageViewalloc] initWithFrame:CGRectMake(0,200,170,170)];

snapImg.backgroundColor = [UIColorredColor];

snapImg.image = imgeee;

[self.viewaddSubview:snapImg];

}

或者：

- (void)snapAction:(UIButton *)btn {

UIImage *image = [self snapshot:_sampleView];

UIImageView *snapImg = [[UIImageView alloc] initWithFrame:CGRectMake(0,200, 170, 170)];

snapImg.layer.borderWidth = 1;

snapImg.image = image;

[self.view addSubview:snapImg];

}

- (UIImage *)snapshot:(UIView *)view {

UIGraphicsBeginImageContextWithOptions(view.bounds.size,YES,0);

[view drawViewHierarchyInRect:view.bounds afterScreenUpdates:YES];

UIImage *image = UIGraphicsGetImageFromCurrentImageContext();

UIGraphicsEndImageContext();

return image;

}

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