iOS----实现scrollView或者scrollView的

- (void)viewDidLoad {

[super viewDidLoad];

_imageview = [[UIImageView alloc]init];

_imageview.image = [UIImage imageNamed:@"F2.jpg"];

self.imageview.frame =CGRectMake(0, -150, self.tableView.frame.size.width, 150);

//此处不能通过添加headerView的方式，因为添加headerview只能设置view的高

[self.tableView addSubview:_imageview];

self.tableView.contentInset = UIEdgeInsetsMake(150, 0, 0, 0);

}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{

return 100;

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{

UITableViewCell * cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:nil];

cell.textLabel.text = @"我是cell";

return cell;

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

-(void)scrollViewDidScroll:(UIScrollView *)scrollView

{

//通过滑动的便宜距离重新给图片设置大小

CGFloat yOffset = scrollView.contentOffset.y;

if(yOffset<-150)

{

CGRect f= self.imageview.frame;

f.origin.y= yOffset;

f.size.height = -yOffset;

self.imageview.frame = f;

}

}