表格頭視圖實現(xiàn)下拉放大圖片需要簽訂 <UIScrollViewDelegate>
// 下拉放大圖片
-(void)xialafangda{
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, -200, [UIScreen mainScreen].bounds.size.width, 200)];
imageView.image = [UIImage imageNamed:@"壁紙112.jpg"];
imageView.contentMode = UIViewContentModeScaleAspectFill;
imageView.tag = 101;
imageView.clipsToBounds = YES;
[self.theTable addSubview:imageView];
}
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
CGPoint point = scrollView.contentOffset;
if (point.y < -200) {
CGRect rect = [self.theTable viewWithTag:101].frame;
rect.origin.y = point.y;
rect.size.height = -point.y;
[self.theTable viewWithTag:101].frame = rect;
}
}
