获取网络图片的宽高

headerImageView.contentMode = UIViewContentModeScaleAspectFit;

[headerScrollView addSubview:headerImageView];
 
int imgWidth = headerImageView.image.size.width;
                int imgHight = headerImageView.image.size.height;
                 
                int aWidth = headerImageView.image.size.width/headerImageView.frame.size.width;
                 
                int LastWidth = imgWidth/aWidth;
                int LastHight = imgHight/aWidth;
 
//视频暂停图片
                UIImageView *imageee = [[UIImageView alloc] initWithFrame:CGRectMake((SCREEN_WIDTH-100)/2, (SCREEN_HEIGHT-100)/2, 370/2, 310/2)];
                imageee.image = LOAD_IMAGE(@"newhouse_mov_stop");
                imageee.center = headerImageView.center;
                [headerScrollView addSubview:imageee];
                 
                UIButton *movbtn = [[UIButton alloc] initWithFrame:CGRectMake(0+i*SCREEN_WIDTH, 0, LastWidth, LastHight)];
                movbtn.backgroundColor = [UIColor clearColor];
                movbtn.tag = 400+i;
                [movbtn addTarget:self action:@selector(doBoFang:) forControlEvents:UIControlEventTouchUpInside];
                movbtn.center = headerImageView.center;
                [headerScrollView addSubview:movbtn];