美团HD(3)-加载分类导航数据

/** 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(300, 360);
// 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];

}

#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