美团HD(3)-加载分类导航数据

DJHomeViewController.m

/** 设置导航栏左侧内容 */
- (void)setupLeftNavItem { // Logo
UIImageView *logoView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"icon_meituan_logo"]];
UIBarButtonItem *logoItem = [[UIBarButtonItem alloc] initWithCustomView:logoView]; // 类别
DJNavItem *categoryView = [DJNavItem item];
[categoryView addTarget:self action:@selector(onCategoryNavItemDidClick)];
UIBarButtonItem *categoryItem = [[UIBarButtonItem alloc] initWithCustomView:categoryView];
self.categoryItem = categoryItem; // 地区
DJNavItem *areaView = [DJNavItem item];
[areaView addTarget:self action:@selector(onAreaNavItemDidClick)];
UIBarButtonItem *areaItem = [[UIBarButtonItem alloc] initWithCustomView:areaView];
self.areaItem = areaItem; // 排序
DJNavItem *sortView = [DJNavItem item];
[sortView addTarget:self action:@selector(onSortNavItemDidClick)];
UIBarButtonItem *sortItem = [[UIBarButtonItem alloc] initWithCustomView:sortView];
self.sortItem = sortItem; self.navigationItem.leftBarButtonItems = @[logoItem,categoryItem,areaItem,sortItem]; } #pragma mark - 导航按钮被点击
- (void)onCategoryNavItemDidClick { // 创建将要显示的Controller
DJCategoryViewController *categoryVC = [[DJCategoryViewController alloc] init];
// 设置控制器View的显示大小
categoryVC.preferredContentSize = CGSizeMake(, );
// 设置Modal类型
categoryVC.modalPresentationStyle = UIModalPresentationPopover;
// 获取Popover
UIPopoverPresentationController *categoryPopover = categoryVC.popoverPresentationController;
// 相对于哪个View来显示
categoryPopover.sourceView = self.categoryItem.customView;
// 显示位置
categoryPopover.sourceRect = self.categoryItem.customView.bounds;
// 设置popover箭头的显示方向
categoryPopover.permittedArrowDirections = UIPopoverArrowDirectionAny;
// 跳转
[self presentViewController:categoryVC animated:YES completion:nil]; }

DJNavDropView.m

#import "DJNavDropView.h"
#import "DJCategory.h" @interface DJNavDropView()<UITableViewDataSource,UITableViewDelegate> @property (weak, nonatomic) IBOutlet UITableView *mainTableView; @end @implementation DJNavDropView + (instancetype)dropView { return[[[NSBundle mainBundle] loadNibNamed:@"DJNavDropView" owner:nil options:nil] lastObject]; } - (void)setCategoryList:(NSArray *)categoryList { _categoryList = categoryList; // 刷新数据
[self.mainTableView reloadData]; } #pragma mark - TableView 数据源方法 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { return self.categoryList.count; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *ID = @"category";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:ID];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:ID];
} DJCategory *categoryItem = self.categoryList[indexPath.row]; cell.textLabel.text = categoryItem.name;
cell.imageView.image = [UIImage imageNamed:categoryItem.icon]; return cell;
} @end

最终效果:

美团HD(3)-加载分类导航数据

上一篇:Mybatis学习记录(七)----Mybatis延迟加载


下一篇:(转)40个Java集合面试问题和答案