php動態生成json
<?php
$page=$_GET["page"]; //獲取page$page=($page-1)*10;
$conn=mysql_connect("127.0.0.1","root",""); //連接本機
mysql_select_db("xutianyu"); //本機數據庫
$sql="select * from news order by nid desc limit ".$page.",10";//從news表中查詢數據並倒敘顯示10個
$result=mysql_query($sql);
echo "{\"news\":[";
$hehe=1;
while($row=mysql_fetch_assoc($result)){ //數組接收返回
$arr=$row;
echo json_encode($arr);//編碼
if($hehe<10){
echo",";
}
$hehe++;
}
echo"]}";
mysql_close($conn);
?>
本文用得ios自帶的json解析
異步加載的兩個協議:
<NSURLConnectionDelegate,NSURLConnectionDataDelegate>
NSString *weburl=[[[NSStringalloc]initWithFormat:@"http://10.2.145.162/testNews/jsonMessage.php?page=%d",page]autorelease];//建立到本機的連接
NSURL *url=[NSURLURLWithString:weburl];//地址
NSURLRequest *request= [NSURLRequestrequestWithURL:url];//請求對象
NSURLConnection *conn=[NSURLConnectionconnectionWithRequest:requestdelegate:self];//開始發送請求連接
[connstart];
實現協議裏面的方法
-(void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
// NSLog(@"得到響應");
dic=[[NSMutableDictionaryalloc]init];//初始化字典
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data//接收數據
{
// NSStringEncoding enc=CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingUTF8);
dic=[NSJSONSerializationJSONObjectWithData:dataoptions:NSJSONReadingMutableLeaveserror:nil];//解析接收到得數據並存放到字典中
}
然後就可以用啦