如何在UITableView中重新加载数据?我使用Web服务并获取存储在数组中的数据。我得到一个数据并在consol上打印,但同样的数组无法在TableView中重新加载。
请帮我如何在桌面视图上显示数据,我多次尝试但无法显示数据。
{
"status": {
"event": [
{
"event_id": "28",
"event_name": "Event name",
"event_title": "svsav",
"img": "http:\/\/edutimeapp.com\/toshow\/chamber-of-commerc\/uploads\/1461402793-Vtcg8pRB.jpg",
"event_date": "2016-04-05",
"event_time": "12:00",
"event_detail": "svsa"
},
#import "ViewController.h"
#import "celltable.h"
@interface ViewController ()
{
NSArray*name;
}
@end
- (void)viewDidLoad {
[super viewDidLoad];
[self.tableview setAllowsMultipleSelection:YES];
NSURLRequest *req=[[NSURLRequest alloc]initWithURL:[NSURL URLWithString:@"http://edutimeapp.com/toshow/chamber-of-commerc/ws/fetch_event.php"]];
response =[[NSMutableData alloc]init];
[NSURLConnection connectionWithRequest:req delegate:self];
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
[response appendData:data];
NSLog(@"error receving data %@",response);
}
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSError *error;
NSLog(@"Error in receiving data %@",error);
NSMutableDictionary *json = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves error:&error];
NSLog(@"response data %@",son);
NSError *jsonParsingError = nil;
NSDictionary *retrievedJTransD = [NSJSONSerialization JSONObjectWithData:response options:0 error:&jsonParsingError];
NSArray* retrievedJTrans = retrievedJTransD[@"status"][@"event"];
name = [retrievedJTrans valueForKey:@"event_name"];
NSLog(@"success %@", name);
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [name count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(@"tableview cell");
celltable *cell = [tableView dequeueReusableCellWithIdentifier:@"ht"];
if (cell==nil)
{
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"Cell" owner:self options:nil];
cell = [nib objectAtIndex:0];
}
cell.date.text=[NSString stringWithFormat:@"%@",[name objectAtIndex:indexPath.row]];
return cell;
}
答案 0 :(得分:1)
你的错误是无法重新加载tableview,接下来你没有正确设置数组值,请使用下面的代码,
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
NSError *error;
NSLog(@"Error in receiving data %@",error);
NSMutableDictionary *json = [NSJSONSerialization JSONObjectWithData:response options:NSJSONReadingMutableLeaves error:&error];
NSLog(@"response data %@",son);
NSError *jsonParsingError = nil;
NSDictionary *retrievedJTransD = [NSJSONSerialization JSONObjectWithData:response options:0 error:&jsonParsingError];
NSArray* retrievedJTrans = retrievedJTransD[@"status"][@"event"];
//you are wrong in name array change it.
name = retrievedJTrans;
NSLog(@"success %@", name);
[self.tableview reloadData];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [name count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(@"tableview cell");
celltable *cell = [tableView dequeueReusableCellWithIdentifier:@"ht"];
if (cell==nil)
{
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:@"Cell" owner:self options:nil];
cell = [nib objectAtIndex:0];
}
cell.date.text=[NSString stringWithFormat:@"%@",[[name objectAtIndex:indexPath.row] valueForKey:@"event_name"]];
return cell;
}
希望它有用
答案 1 :(得分:0)
从WS获得响应后
dispatch_async(dispatch_get_main_queue(), ^{
[self.yourTableview reloadData];
});
永远记住当你需要重新加载tableview并且你正在使用WS Call或任何其他块操作时,在主线程中重新加载它