iOS时间轴的实现
jopen
10年前
最近项目需求，恰好要做一个时间轴，而iOS这方面时间轴的例子也比较少，我就把自己所做的例子和思路共享出来给大家，共同学习。
时间轴的具体实现效果如图1所示：
图1
第一步：看到这个图，我们想到的第一反应就是使用tableView或者CollectionView来完成，那么我这里使用的是tableView。首先，创建一个Single View Application项目，在Main.Storyboard里面拖入一个TableView（如图2所示），这里别忘记了把TableView的delegate指向ViewController。
图 2
第二步：TableView完成了，接下来就是如何自定义TableViewCell了。在项目中new file选择Cocoa Touch Class，然后选择继承自TableViewCell，然后勾选XIB file选项，命名为“TimeCourseTableViewCell”，点击创建，完成后如图3所示：
图 3
接下来，就是为这个xib文件布局，通过图4圈出来的，我们可以找出一个cell里面具有什么控件。
图 4
根据这个，我们布局出来的如图5所示，主要就是Label和View来完成布局。
图 5
其实这里肯定会有人有疑问：
1.为什么下面那个不直接用一个Button就好了呢，还要用一个View里面嵌套一个Label呢？
2.为什么"内容"的那个label还要添加一个父控件View呢？
其实，刚开始的时候，我确实也是使用简单的一个Button和一个Label以为就可以了。后来发现，莫名的出现明明设置了buttom和label的Frame，修改了Origin，却总是出现乱七八糟的位置，后来通过view嵌套在里面，改变view的位置，就完全可以实现了。这个BUG本人也不清楚，望知情人告知，谢谢。
第三步：接下来，看xib里面的TimeCourseTableViewCell.h文件里的代码：
#import <UIKit/UIKit.h> @interface TimeCourseTableViewCell : UITableViewCell @property (weak, nonatomic) IBOutlet UILabel *lbDate; //日期 @property (weak, nonatomic) IBOutlet UILabel *lbTime; //时间 @property (weak, nonatomic) IBOutlet UIView *infoView; //白色底的那个View @property (weak, nonatomic) IBOutlet UILabel *lbInfoTitle; //通知标题 @property (weak, nonatomic) IBOutlet UILabel *lbInfoContent; //通知内容 @property (weak, nonatomic) IBOutlet UIView *infoContentView; //通知内容的父View @property (weak, nonatomic) IBOutlet UILabel *lbSegment; //竖着的灰色分割线 @property (weak, nonatomic) IBOutlet UIView *receiveView; //深红色的View @property (weak, nonatomic) IBOutlet UILabel *lbReceive; //轻触收到通知 - (CGFloat)setCellHeight:(NSString *)strInfo isSameDay:(BOOL)isSame; - (void)setRidues; - (void)setClick; - (void)setNotClick; @end
TimeCourseTableViewCell.m文件里的代码：
#import "TimeCourseTableViewCell.h" @implementation TimeCourseTableViewCell @synthesize lbDate; @synthesize lbTime; @synthesize infoView; @synthesize lbInfoTitle; @synthesize lbInfoContent; @synthesize lbReceive; @synthesize receiveView; @synthesize lbSegment; @synthesize infoContentView; - (void)awakeFromNib { // Initialization code } /*去掉上面的日期*/ - (void)deleteDate{ lbDate.hidden = YES; CGRect timeTemp = lbTime.frame; timeTemp.origin = CGPointMake(timeTemp.origin.x, 8); lbTime.frame = timeTemp; CGRect infoViewTemp = infoView.frame; infoViewTemp.origin = CGPointMake(infoViewTemp.origin.x, 8); infoView.frame = infoViewTemp; } /*设置显示的文本高度，以确定整个tableViewCell的高度，最后返回cell高度*/ - (CGFloat)setCellHeight:(NSString *)strInfo isSameDay:(BOOL)isSame{ /*如果是同一天 则去掉上面的日期*/ if (isSame) { [self deleteDate]; } [lbInfoContent setNumberOfLines:0]; //0行，则表示根据文本长度，自动增加行数 NSString *labelText = strInfo; NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:labelText]; NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init]; [paragraphStyle setLineSpacing:5.0f];//调整行间距 [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [labelText length])]; lbInfoContent.attributedText = attributedString; [lbInfoContent sizeToFit]; //填充 //NSLog(@"%@",lbInfoContent); CGRect infoContentViewTemp = infoContentView.frame; infoContentViewTemp.size = CGSizeMake(212, lbInfoContent.frame.size.height); infoContentView.frame = infoContentViewTemp; /*设置手势点击位置*/ CGRect btnTemp = receiveView.frame; btnTemp.origin = CGPointMake(0, infoContentView.frame.origin.y + infoContentView.frame.size.height + 8 ); receiveView.frame = btnTemp; //NSLog(@"%@",receiveView); /*设置整个infoView高度*/ CGRect viewTemp = infoView.frame; viewTemp.size = CGSizeMake(viewTemp.size.width, receiveView.frame.origin.y + receiveView.frame.size.height); infoView.frame = viewTemp; //NSLog(@"%@",infoView); lbSegment.frame = CGRectMake(lbSegment.frame.origin.x, 0, 3, infoView.frame.origin.y + infoView.frame.size.height + 8); NSLog(@"HEight %f",infoView.frame.origin.y + infoView.frame.size.height + 8); return infoView.frame.origin.y + infoView.frame.size.height + 8; } /*设置圆形*/ - (void)setRidues{ lbTime.layer.cornerRadius = lbTime.frame.size.width / 2; [lbTime.layer setMasksToBounds:YES]; } /*设置点击阅读样式*/ - (void)setClick{ CGFloat R = (CGFloat) 128/255.0; CGFloat G = (CGFloat) 128/255.0; CGFloat B = (CGFloat) 128/255.0; CGFloat alpha = (CGFloat) 1.0; UIColor *ColorRGB = [ UIColor colorWithRed: R green: G blue: B alpha: alpha ]; receiveView.backgroundColor = ColorRGB; lbReceive.text = @"我已收到通知"; } /*设置未点击阅读样式*/ - (void)setNotClick{ CGFloat R = (CGFloat) 255/255.0; CGFloat G = (CGFloat) 83/255.0; CGFloat B = (CGFloat) 83/255.0; CGFloat alpha = (CGFloat) 1.0; UIColor *ColorRGB = [ UIColor colorWithRed: R green: G blue: B alpha: alpha ]; receiveView.backgroundColor = ColorRGB; lbReceive.text = @"轻触收到通知"; } - (void)setSelected:(BOOL)selected animated:(BOOL)animated { [super setSelected:selected animated:animated]; // Configure the view for the selected state } @end接下来，看ViewController.m文件里的代码：
#import "ViewController.h" #import "TimeCourseTableViewCell.h" @interface ViewController () @property (weak, nonatomic) IBOutlet UITableView *messageTableView; @property int messageSum; //cell个数 @property NSArray *infoArray; //保存信息内容 @property NSMutableArray *clickArray; //记录是否已经阅读了信息 1未接收 0接收 @end @implementation ViewController @synthesize messageSum; - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. /*tableView*/ [self setTableViewStyle]; messageSum = 10; self.infoArray = [[NSArray alloc] initWithObjects:@"老夫聊发少年狂，治肾亏，不含糖。", @"锦帽貂裘，千骑用康王。", @"", @"为报倾城随太守，三百年，九芝堂。酒酣胸胆尚开张，西瓜霜，喜之郎。", @"持节云中，三金葡萄糖。会挽雕弓如满月，西北望 ，阿迪王。", @"十年生死两茫茫，恒源祥，羊羊羊。", @"千里孤坟，洗衣用奇强。", @"纵使相逢应不识，补维C，施尔康。", @"夜来幽梦忽还乡，学外语，新东方。相顾无言，洗洗更健康。得年年断肠处，找工作，富士康", @"啦啦啦",nil]; self.clickArray = [[NSMutableArray alloc] initWithObjects:@"1", @"1", @"1", @"1", @"1", @"1", @"1", @"1", @"1", @"1",nil]; } #pragma mark - 设置messageTableView的背景色和去掉分割线 - (void)setTableViewStyle{ self.messageTableView.separatorStyle = UITableViewCellSeparatorStyleNone; //去掉tabelView分割线 CGFloat R = (CGFloat) 237/255.0; CGFloat G = (CGFloat) 237/255.0; CGFloat B = (CGFloat) 237/255.0; CGFloat alpha = (CGFloat) 1.0; UIColor *ColorRGB = [ UIColor colorWithRed: R green: G blue: B alpha: alpha ]; [self.messageTableView setBackgroundColor:ColorRGB]; } #pragma mark - TabelView数据源协议 //该方法指定了表格视图的行数 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{ return messageSum; } - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{ //按时间分组，假设这里[0,2],[3,5],[6,9]是同一天 TimeCourseTableViewCell *nib = [[[NSBundle mainBundle] loadNibNamed:@"TimeCourseTableViewCell" owner:self options:nil] lastObject]; if ([indexPath row] == 0) { NSLog(@"0"); return [nib setCellHeight:[self.infoArray objectAtIndex:[indexPath row]] isSameDay:NO]; } else if ([indexPath row]<3) { NSLog(@"0 - 3"); return [nib setCellHeight:[self.infoArray objectAtIndex:[indexPath row]] isSameDay:YES]; }else if ([indexPath row] == 3){ NSLog(@"3"); return [nib setCellHeight:[self.infoArray objectAtIndex:[indexPath row]] isSameDay:NO]; }else if ([indexPath row] < 6){ NSLog(@"3 - 6"); NSLog(@"%f",[nib setCellHeight:[self.infoArray objectAtIndex:[indexPath row]] isSameDay:YES]); return [nib setCellHeight:[self.infoArray objectAtIndex:[indexPath row]] isSameDay:YES]; }else if ([indexPath row] == 6){ NSLog(@"6"); NSLog(@"%f",[nib setCellHeight:[self.infoArray objectAtIndex:[indexPath row]] isSameDay:NO]); return [nib setCellHeight:[self.infoArray objectAtIndex:[indexPath row]] isSameDay:NO]; }else if ([indexPath row] > 6){ NSLog(@"6- 9"); NSLog(@"%f",[nib setCellHeight:[self.infoArray objectAtIndex:[indexPath row]] isSameDay:YES]); return [nib setCellHeight:[self.infoArray objectAtIndex:[indexPath row]] isSameDay:YES]; }else return 145; } //该方法返回单元格对象，有多少行表格，则调用多少次 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{ static NSString *simpleIdentify = @"TimeCourse"; UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleIdentify]; TimeCourseTableViewCell *nib = [[[NSBundle mainBundle] loadNibNamed:@"TimeCourseTableViewCell" owner:self options:nil] lastObject]; [nib setTag:[indexPath row]]; if ([[self.clickArray objectAtIndex:[indexPath row]] isEqualToString:@"1"]) { [nib setNotClick]; }else [nib setClick]; [nib setRidues]; UITapGestureRecognizer *Tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGesture:)]; nib.receiveView.userInteractionEnabled = YES; [nib.receiveView addGestureRecognizer:Tap]; if ([indexPath row] == 0) { [nib setCellHeight:[self.infoArray objectAtIndex:[indexPath row]] isSameDay:NO]; } else if ([indexPath row]<3) { [nib setCellHeight:[self.infoArray objectAtIndex:[indexPath row]] isSameDay:YES]; }else if ([indexPath row] == 3){ [nib setCellHeight:[self.infoArray objectAtIndex:[indexPath row]] isSameDay:NO]; }else if ([indexPath row] < 6){ [nib setCellHeight:[self.infoArray objectAtIndex:[indexPath row]] isSameDay:YES]; }else if ([indexPath row] == 6){ [nib setCellHeight:[self.infoArray objectAtIndex:[indexPath row]] isSameDay:NO]; }else if ([indexPath row] > 6){ [nib setCellHeight:[self.infoArray objectAtIndex:[indexPath row]] isSameDay:YES]; } cell = nib; cell.selectionStyle = UITableViewCellSelectionStyleNone; //去掉提供的选中无颜色 return cell; } #pragma mark - TabelView代理协议 //选中事件 -(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath { NSLog(@"44"); } - (void)tapGesture:(UITapGestureRecognizer *)sender{ NSLog(@"接收通知"); UIView *view = sender.self.view; TimeCourseTableViewCell *cell = (TimeCourseTableViewCell *)view.superview.superview.superview; UILabel *lb = view.subviews[0]; NSString *str = @"轻触收到通知"; if ([lb.text isEqualToString:str]) { [cell setClick]; [self.clickArray setObject:@"0" atIndexedSubscript:cell.tag]; } } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end那么，运行之后，效果如图6所示：
图 6
改一下颜色，完成如下：
至此，整个时间轴完成。
思路大概如下：
1.根据时间分组：判断是不是同一天，如果是则把上面的日期隐藏，整体布局往上移动。
2.获取点击的是哪个cell：通过给cell添加tag，那么我单击手势时候，便可以获取出cell，然后更改这个cell的样式
可能写的不是很明白，大家可以认真看一下代码。
源码地址免费下载：http://download.csdn.net/detail/junlinfushi/8345531
来自：http://www.cnblogs.com/linjianxiang/p/4213926.html
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