#import "ZJHttpRequest.h"
//消除performSelector的警告
#pragma clang diagnostic ignored"-Warc-performSelector-leaks"
//类扩展
//项目实践：
//有些实例变量内部使用，不想放在头文件中，就放在这儿
@interface ZJHttpRequest()<NSURLConnectionDataDelegate>
{

    NSURLConnection*_connection;
    NSString*_url;
    id _target;
    SEL _action;
}

@end
@implementation ZJHttpRequest
//作用：
//传入网址，下载完成执行target对象中action方法


-(void)requestWithUrl:(NSString *)url target:(id)target action:(SEL)action
{
    _url=url;
    _target=target;
    _action=action;
    
//    发起URL请求
    
    _data=[[NSMutableData alloc]init];
    _connection=[[NSURLConnection alloc]initWithRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:url]] delegate:self startImmediately:YES];

}
-(void)connection:(NSURLConnection*)connection didReceiveData:(NSData *)data
{

    [_data appendData:data];
}

-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
//    下载完成了，执行保存的方法
    
    if (_target && [_target respondsToSelector:_action]) {
   
    [_target performSelector:_action withObject:self ];
    }
}
@end

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
//    数据接口
       NSString*urlString=@"http://iappfree.candou.com:8080/free/applications/limited?currency=rmb&page=1&category_id=";

    
    _dataArray=[[NSMutableArray alloc]init];
    
    //    下载
    _request = [[ZJHttpRequest alloc]init];
    [_request requestWithUrl:urlString target:self action:@selector(dealDownloadFinish:)];
    
    [self creatTableView];
    
}

-(void)creatTableView
{

    _tableview=[[UITableView alloc]initWithFrame:self.view.bounds style:UITableViewStylePlain];
    _tableview.delegate=self;
    _tableview.dataSource=self;
    [self.view addSubview:_tableview];


}
-(NSInteger )tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return _dataArray.count;

}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 100;

}
-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
   static NSString*cellID=@"cell";
    AppCell*cell=[tableView dequeueReusableCellWithIdentifier:cellID];
    if (cell == nil) {
        cell=[[AppCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:cellID];
    }

   AppModel*model=_dataArray[indexPath.row];
//    cell.textLabel.text= model.name;
    cell.nameLabel.text=model.name;
  
//    从网络中加载图片
    [cell.iconImageView setImageWithURL:[NSURL URLWithString:model.iconUrl]];
    return cell;

}
-(void)dealDownloadFinish:(ZJHttpRequest*)request
{
    NSDictionary*dic=[NSJSONSerialization JSONObjectWithData:request.data options:NSJSONReadingMutableContainers error:nil];
    NSLog(@"dic= %@",dic);
    NSArray *appList=dic[@"applications"];
    for (NSDictionary*appDict in appList) {
        AppModel*model=[[AppModel alloc]init];
        model.applicationId=appDict[@"application"];
        model.name=appDict[@"name"];
        model.iconUrl=appDict[@"iconUrl"];
        [_dataArray addObject:model];
        
    }
//    下载数据刷新显示
    [_tableview reloadData];
}