php动态生成json
<?php
$page=$_GET["page"]; //获取page$page=($page-1)*10;
$conn=mysql_connect("127.0.0.1","root",""); //连接本机
mysql_select_db("xutianyu"); //本机数据库
$sql="select * from news order by nid desc limit ".$page.",10";//从news表中查询数据并倒叙显示10个
$result=mysql_query($sql);
echo "{\"news\":[";
$hehe=1;
while($row=mysql_fetch_assoc($result)){ //数组接收返回
$arr=$row;
echo json_encode($arr);//编码
if($hehe<10){
echo",";
}
$hehe++;
}
echo"]}";
mysql_close($conn);
?>
本文用得ios自带的json解析
异步加载的两个协议:
<NSURLConnectionDelegate,NSURLConnectionDataDelegate>
NSString *weburl=[[[NSStringalloc]initWithFormat:@"http://10.2.145.162/testNews/jsonMessage.php?page=%d",page]autorelease];//建立到本机的连接
NSURL *url=[NSURLURLWithString:weburl];//地址
NSURLRequest *request= [NSURLRequestrequestWithURL:url];//请求对象
NSURLConnection *conn=[NSURLConnectionconnectionWithRequest:requestdelegate:self];//开始发送请求连接
[connstart];
实现协议里面的方法
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
// NSLog(@"得到响应");
dic=[[NSMutableDictionaryalloc]init];//初始化字典
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data//接收数据
{
// NSStringEncoding enc=CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingUTF8);
dic=[NSJSONSerializationJSONObjectWithData:dataoptions:NSJSONReadingMutableLeaveserror:nil];//解析接收到得数据并存放到字典中
}
然后就可以用啦