34.小项目：汽车列表 版本2.0
更新说明：增加多组数据展示
------------- ViewController.m -------------
#import "ViewController.h"
#import "CZCarGroup.h"
@interface ViewController () <UITableViewDataSource>
@property (weak, nonatomic) IBOutlet UITableView *tableView;
@property (nonatomic, strong) NSArray *carGroups;
@end
@implementation ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
self.tableView.dataSource = self;
}
- (NSArray *)carGroups
{
if (_carGroups == nil)
{
CZCarGroup *carG0 = [[CZCarGroup alloc] init];
carG0.header = @"德系品牌";
carG0.footer = @"高端大气上档次，世界一流品牌";
carG0.cars = @[@"宝马", @"奔驰"];
CZCarGroup *carG1 = [[CZCarGroup alloc] init];
carG1.header = @"日系品牌";
carG1.footer = @"燃油经济，性价比高";
carG1.cars = @[@"本田", @"丰田"];
CZCarGroup *carG2 = [[CZCarGroup alloc] init];
carG2.header = @"国产品牌";
carG2.footer = @"实用性高，价格实惠，支持国产";
carG2.cars = @[@"奇瑞"];
_carGroups = @[carG0, carG1, carG2];
}
return _carGroups;
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return self.carGroups.count;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [self.carGroups[section] cars].count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:nil];
CZCarGroup * carG = self.carGroups[indexPath.section];
cell.textLabel.text = carG.cars[indexPath.row];
return cell;
}
- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
return [self.carGroups[section] header];
}
- (NSString *)tableView:(UITableView *)tableView titleForFooterInSection:(NSInteger)section
{
return [self.carGroups[section] footer];
}
@end
------------- CZCarGroup.h -------------
#import <Foundation/Foundation.h>
@interface CZCarGroup : NSObject
@property (nonatomic,copy) NSString *header;
@property (nonatomic,copy) NSString *footer;
@property (nonatomic,strong) NSArray *cars;
@end
------------- CZCarGroup.m -------------
#import "CZCarGroup.h"
@implementation CZCarGroup
@end
