实现表格视图下拉变大

#import "ViewController.h" #define W [UIScreen mainScreen].bounds.size.width #define H [UIScreen mainScreen].bounds.size.height @interface ViewController ()<UITableViewDelegate,UITableViewDataSource> @property (nonatomic, retain) UITableView *tableView; @property (nonatomic, retain) NSMutableArray *arraySource; @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. self.arraySource = [[NSMutableArray alloc]init]; self.tableView = [[UITableView alloc]initWithFrame:CGRectMake(0, 20, W, H-20) style:UITableViewStylePlain]; self.tableView.delegate = self; self.tableView.dataSource = self; [self.view addSubview:self.tableView]; for (NSInteger i = 0; i < 10; i++) { NSString *str = [NSString stringWithFormat:@"====我是第%ld行====", i]; [self.arraySource addObject:str]; } self.tableView.contentInset = UIEdgeInsetsMake(200, 0, 0, 0); UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, -200, [UIScreen mainScreen].bounds.size.width, 200)]; imageView.image = [UIImage imageNamed:@"1"]; imageView.contentMode = UIViewContentModeScaleAspectFill; imageView.tag = 101; [self.tableView addSubview:imageView]; } #pragma make - UITableViewDataSource -(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView { return 1; } -(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return self.arraySource.count; } -(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *cellID = @"cell"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellID]; if (cell == nil) { cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellID]; cell.textLabel.text = self.arraySource[indexPath.row]; } return cell; } //返回每个单元格的行高 - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath { return 100; } //监听点击的是哪一行 -(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { //取消选中行 [tableView deselectRowAtIndexPath:indexPath animated:YES]; } //最主要的代码 - (void)scrollViewDidScroll:(UIScrollView *)scrollView { CGPoint point = scrollView.contentOffset; if (point.y < -200) { CGRect rect = [self.tableView viewWithTag:101].frame; rect.origin.y = point.y; rect.size.height = -point.y; [self.tableView viewWithTag:101].frame = rect; } } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end