自定义UITableView折叠效果详解手机开发

类似于QQ的那种折叠效果。只刷新点击的折叠行。不加载所有数据源。 测试环境Xcode4.3.3+SDK5.1兼容ios6

// 

// MyTableViewController.m 

// TableSectionStatistics 

#import "MyTableViewController.h" 

#define originalHeight 25.0f 

#define newHeight 85.0f 

#define isOpen @"85.0f" 

@interface MyTableViewController () 

@end 

@implementation MyTableViewController 

 NSMutableDictionary *dicClicked; 

 NSInteger count; 

 CGFloat mHeight; 

 NSInteger sectionIndex; 

- (id)initWithStyle:(UITableViewStyle)style 

 self = [super initWithStyle:style]; 

 if (self) { 

 // Custom initialization 

 return self; 

- (void)viewDidLoad 

 [super viewDidLoad]; 

 count = 0; 

 mHeight = originalHeight; 

 sectionIndex = 0; 

 dicClicked = [NSMutableDictionary dictionaryWithCapacity:3]; 

- (void)viewDidUnload 

 [super viewDidUnload]; 

 // Release any retained subviews of the main view. 

 // e.g. self.myOutlet = nil; 

#pragma mark - Table view data source 

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView 

 // Return the number of sections. 

 return 50; 

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

 return 2; 

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

 static NSString *contentIndentifer = @"Container"; 

 if (indexPath.row == 0) { 

 UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:contentIndentifer]; 

 if (cell == nil) { 

 cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:contentIndentifer]; 

 NSString *statisticsContent = [[NSString alloc] initWithString:@"rlf:岁月流芳，花开几度，走在岁月里，醉在流香里，总在时光里辗转徘徊。花开几许，落花几度，岁月寒香，飘进谁的诗行，一抹幽香，掺入几许愁伤，流年似花，春来秋往，睁开迷离的双眼，回首张望，随风的尘烟荡漾着迷忙，昨日的光阴已逝去，留下无尽的回忆让人留恋与追忆"]; 

 cell.textLabel.font = [UIFont systemFontOfSize:12.0f]; 

 cell.textLabel.text = statisticsContent; 

 cell.textLabel.textColor = [UIColor brownColor] 

 cell.textLabel.opaque = NO; // 选中Opaque表示视图后面的任何内容都不应该绘制 

 cell.textLabel.numberOfLines = 8; 

 cell.selectionStyle = UITableViewCellSelectionStyleNone; 

 return cell; 

 static NSString *CellIdentifier = @"Cell"; 

 UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier]; 

 if (cell == nil) { 

 cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier]; 

 cell.imageView.image = [UIImage imageNamed:@"ic_milestone_heart.png"]; 

 cell.textLabel.text = [NSString stringWithFormat:@"%d",count]; 

 count++; 

 return cell; 

//Section的标题栏高度 

-(CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section 

 if (section == 0) 

 return 46; 

 else 

 return 30.0f; 

-(UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section 

 CGRect headerFrame = CGRectMake(0, 0, 300, 30); 

 CGFloat y = 2; 

 if (section == 0) { 

 headerFrame = CGRectMake(0, 0, 300, 100); 

 y = 18; 

 UIView *headerView = [[UIView alloc] initWithFrame:headerFrame]; 

 UILabel *dateLabel=[[UILabel alloc] initWithFrame:CGRectMake(20, y, 240, 24)];//日期标签 

 dateLabel.font=[UIFont boldSystemFontOfSize:16.0f]; 

 dateLabel.textColor = [UIColor darkGrayColor]; 

 dateLabel.backgroundColor=[UIColor clearColor]; 

 UILabel *ageLabel=[[UILabel alloc] initWithFrame:CGRectMake(216, y, 88, 24)];//年龄标签 

 ageLabel.font=[UIFont systemFontOfSize:14.0]; 

 ageLabel.textAlignment=UITextAlignmentRight; 

 ageLabel.textColor = [UIColor darkGrayColor]; 

 ageLabel.backgroundColor=[UIColor clearColor]; 

 NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 

 dateFormatter.dateFormat = @"MM dd,yyyy"; 

 dateLabel.text = [NSString stringWithFormat:@"%@",[dateFormatter stringFromDate:[NSDate date]]]; 

 ageLabel.text = @"1岁 2天"; 

 [headerView addSubview:dateLabel]; 

 [headerView addSubview:ageLabel]; 

 return headerView; 

#pragma mark - Table view delegate 

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath 

 if (indexPath.row == 0) { 

 UITableViewCell *targetCell = [tableView cellForRowAtIndexPath:indexPath]; 

 if (targetCell.frame.size.height == originalHeight+1){ 

 [dicClicked setObject:isOpen forKey:indexPath]; 

 else{ 

 [dicClicked removeObjectForKey:indexPath]; 

 [self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; 

 NSLog(@"indexPath=%@",indexPath); 

 NSLog(@"dicClicked=%@",dicClicked); 

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath 

 if (indexPath.row == 0) { 

 if ([[dicClicked objectForKey:indexPath] isEqualToString: isOpen]) 

 return [[dicClicked objectForKey:indexPath] floatValue]; 

 else 

 return originalHeight; 

 else { 

 return 45.0f; 

@end 

 

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