仿照UITableView的UITableViewDataSource 协义
1.代理，让代理帮我们类完成一些方法
2.完成当前类不能完成的事情还有传值等功能
实现方法
// 1. 声明一个协议
// 2. 声明协议中的方法
// 3. 声明一个遵守协议的id类型的指针
// 4. 实现协议方法
@class popView;
@protocol MyPopviewDataSource <NSObject>
//制定协议方法
//left tablevie 行数
- (NSInteger)numberOfRowsInLeftTable:(popView *)popView;
//left 标题
- (NSString *)popView:(popView *)popView titleForRow:(NSInteger)row;
//left 图标
- (NSString *)popView:(popView *)popView imageForRow:(NSInteger)row;
//left 子数据
- (NSArray *)popView:(popView *)popView subDataForRow:(NSInteger)row;
@end
@interface popView :
UIView
@property (nonatomic,assign)id<MyPopviewDataSource> dataSource;
+ (popView*)makePopView;
@end
#import "popView.h"
@interface
popView ()<UITableViewDataSource,UITableViewDelegate>
@property (weak,
nonatomic) IBOutlet
UITableView *leftTV;
@property (weak,
nonatomic) IBOutlet
UITableView *rightTV;
@property (nonatomic,assign)
NSInteger selectRow;
@end
@implementation popView
+ (popView *)makePopView
{
return [[[NSBundle
mainBundle]loadNibNamed:@"popView"
owner:self
options:nil]firstObject];
}
#pragma mark - tableview delegate
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
if (tableView == _leftTV) {
return [self.dataSource
numberOfRowsInLeftTable:self];
}else{
return [self.dataSource
popView:self
subDataForRow:_selectRow].count;
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath
*)indexPath
{
if (tableView == _leftTV) {
static NSString *str =
@"Mycell";
UITableViewCell *cell = [tableView
dequeueReusableCellWithIdentifier:str];
if (cell == nil) {
cell = [[UITableViewCell
alloc]initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:str];
}
cell.textLabel.text = [self.dataSource
popView:self
titleForRow:indexPath.row];
cell.imageView.image = [UIImage
imageNamed:[self.dataSource
popView:self
imageForRow:indexPath.row]];
NSArray *subDataArray = [self.dataSource
popView:self
subDataForRow:indexPath.row];
if (subDataArray.count) {
cell.accessoryType =
UITableViewCellAccessoryDisclosureIndicator;
}else{
cell.accessoryType =
UITableViewCellAccessoryNone;
}
return cell;
}else{
static NSString *str =
@"Mycell";
UITableViewCell *cell = [tableView
dequeueReusableCellWithIdentifier:str];
if (cell == nil) {
cell = [[UITableViewCell
alloc]initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:str];
}
cell.textLabel.text = [self.dataSource
popView:self
subDataForRow:_selectRow][indexPath.row];
return cell;
}
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath
*)indexPath
{
if (tableView == _leftTV) {
self.selectRow = indexPath.row;
[_rightTV
reloadData];
}
}
@end
在控制器使用
#import "PopViewController.h"
#import "popView.h"
#import "CategoriyModel.h"
@interface
PopViewController ()<MyPopviewDataSource>
@end
@implementation PopViewController
- (void)viewDidLoad
{
[super
viewDidLoad];
popView *pop = [popView
makePopView];
[self.view
addSubview:pop];
pop.dataSource =
self;
pop.autoresizingMask =
UIViewAutoresizingNone;
self.preferredContentSize =
CGSizeMake(pop.frame.size.width, pop.frame.size.height);
}
//获取到
第一个分类数据下拉菜单的模型数组
- (NSArray *)getData
{
CategoriyModel *md = [[CategoriyModel
alloc]init];
NSArray *categorieyArray = [md
loadPlistData];
return categorieyArray;
}
#pragma mark - popview dataSource
- (NSInteger)numberOfRowsInLeftTable:(popView *)popView{
return [self
getData].count;
}
- (NSString *)popView:(popView *)popView titleForRow:(NSInteger)row{
return [[self
getData][row]name];
}
- (NSString *)popView:(popView *)popView imageForRow:(NSInteger)row{
return [[self
getData][row]small_icon];
}
- (NSArray *)popView:(popView *)popView subDataForRow:(NSInteger)row{
return [[self
getData][row]subcategories];
}
@end
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