获取wkwebview的缩略图 wkwebview截屏
-(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
}