iOS的截屏

之前一直有一个误解，
苹果手机截图，一定要获取截图的权限，事情其实不然。(hacker会使用这招获取密码)
iOS 获取屏幕某个区域的截图 传送门：http://blog.csdn.net/allangold/article/details/53262097

代码如下：
-(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;

}