json解析在ios + php中 [英] json parsing in ios+php
问题描述
我在PHP中创建了具有1个参数的1个函数的web服务。
我使用phpMyadmin作为后端。
它使用json格式获取数据。
Web服务工作正常。
我想在我的iPhone应用程序中使用此Web服务。
我想传递1个参数。
我也提到了rayWenderlich教程。
但找不到解决方案。
请帮助我。
这是我的网络服务代码：
<？php
echo getdata（$ _ REQUEST ['lastupdate']）;
函数getdata（$ lastupdatedate）{
$ json ='{foo-bar：12345}';
$ obj = json_decode（$ json）;
// print $ obj-> {'foo-bar'}; // 12345
$ con = mysql_connect（localhost，un，Password）;
if（！$ con）{
die（'Could not connect：'。mysql_error（））;
}
// print_r（$ con）;
mysql_select_db（roster，$ con）;
$ query =select * from rates where LastUpdated ='。$ lastupdatedate。'by LastUpdated limit 1;
$ rs = mysql_query（$ query）或die（$ query）;
// print_r（$ rs）;
while（$ row = mysql_fetch_assoc（$ rs））{
$ record [] = $ row;
}
$ data = json_encode（$ record）;
header（'Cache-Control：no-cache，must-revalidate'）;
header（'Expires：Mon，1997年7月26日05:00:00 GMT'）;
header（'Content-type：application / json'）;
返回$ data;
}
Iphone App端，我已经在下面的代码尝试过了：
- （void）GETJSONDATA
{
SBJSON * json = [SBJSON new];
json.humanReadable = YES;
responseData = [NSMutableData data];
NSString * service = @;
NSString * str;
str = @LastUpdated;
NSString * requestString = [NSString stringWithFormat：@{\LastUpdated \：\％@ \}，str];
// [[NSUserDefaults standardUserDefaults] setValue：nil forKey：@WRONGANSWER];
NSLog（@request string：％@，requestString）;
NSData * requestData = [NSData dataWithBytes：[requestString UTF8String] length：[requestString length]];
NSString * fileLoc = [[NSBundle mainBundle] pathForResource：@URLNameofType：@plist];
NSDictionary * fileContents = [[NSDictionary alloc] initWithContentsOfFile：fileLoc];
NSString * urlLoc = [fileContents objectForKey：@URL];
urlLoc = [urlLoc stringByAppendingString：@？lastupdate = 2012-09-01 01:00:00];
NSLog（@URL：％@，urlLoc）;
NSMutableURLRequest * request = [[NSMutableURLRequest alloc] initWithURL：
[NSURL URLWithString：urlLoc]];
NSString * postLength = [NSString stringWithFormat：@％d，[requestData length]];
[request setHTTPMethod：@POST];
[request setValue：postLength forHTTPHeaderField：@Content-Length];
[request setValue：@application / jsonforHTTPHeaderField：@Content-Type];
[request setHTTPBody：requestData];
NSError * respError = nil;
NSData * returnData = [NSURLConnection sendSynchronousRequest：request returningResponse：nil error：& respError];
$ b $ if（respError）
{
// NSString * msg = [NSString stringWithFormat：@Connection failed！Error - ％@％@，
// [respError localizedDescription]，
// [[respError userInfo] objectForKey：NSURLErrorFailingURLStringErrorKey]];
UIAlertView * alertView = [[UIAlertView alloc] initWithTitle：@ACTEC
message：@检查您的网络连接委托：self cancelButtonTitle：@OK
otherButtonTitles：nil];
[alertView show];
}
else
{
NSUserDefaults * dd = [NSUserDefaults standardUserDefaults];
NSString * responseString = [[NSString alloc] initWithData：returnData encoding：NSUTF8StringEncoding];
NSLog（@Resp：％@，responseString）;
NSDictionary * results = [responseString JSONValue];
NSLog（@results =％@，results）;
$ b
您可能想使用库来查看。 AFNetworking 提供了一个名为AFHTTPClient的类，允许您连接到一个安静的Web服务并对其进行简单调用。假设有一个终点，你可以这样做：
pre $ NS $ Dictionary $ { @最近更新时间];
NSString * fileLoc = [[NSBundle mainBundle] pathForResource：@URLNameofType：@plist];
NSDictionary * fileContents = [[NSDictionary alloc] initWithContentsOfFile：fileLoc];
NSString * urlLoc = [fileContents objectForKey：@URL];
urlLoc = [urlLoc stringByAppendingString：@？lastupdate = 2012-09-01 01:00:00];
AFHTTPClient * client = [AFHTTPClient clientWithBaseURL：[NSURL URLWithString：urlLoc]];
[client postPath：@endpointparameters：body success：^（AFHTTPRequestOperation * operation，id responseObject）{
//对responseObject做某事
}失败：^（AFHTTPRequestOperation *操作，NSError *错误）{
//记录错误并继续
}];
您可以在这里找到文档： http://engineering.gowalla.com/AFNetworking/Classes/AFHTTPClient.html
I have created web service in PHP which is having 1 function with 1 parameter. I am using phpMyadmin as back end. It is using json format for fetching data. Web service is working perfectly. I want to use this web service in my iPhone app. I want to pass 1 parameter. I have referred rayWenderlich tutorial also as reference. But can not find the solution. Please help me out.
This is my web service code:
<?php
echo getdata($_REQUEST['lastupdate']);
function getdata($lastupdatedate){
$json = '{"foo-bar": 12345}';
$obj = json_decode($json);
//print $obj->{'foo-bar'}; // 12345
$con = mysql_connect("localhost","un","Password");
if (!$con){
die('Could not connect: ' . mysql_error());
}
//print_r($con);
mysql_select_db("roster", $con);
$query = "select * from rates where LastUpdated = '".$lastupdatedate."' order by LastUpdated limit 1";
$rs = mysql_query($query) or die($query);
//print_r($rs);
while($row=mysql_fetch_assoc($rs)){
$record[] = $row;
}
$data = json_encode($record);
header('Cache-Control: no-cache, must-revalidate');
header('Expires: Mon, 26 Jul 1997 05:00:00 GMT');
header('Content-type: application/json');
return $data;
}
Iphone App side , I have tried below code:
-(void)GETJSONDATA
{
SBJSON *json = [SBJSON new];
json.humanReadable = YES;
responseData = [NSMutableData data];
NSString *service = @"";
NSString *str;
str = @"LastUpdated";
NSString *requestString = [NSString stringWithFormat:@"{\"LastUpdated\":\"%@\"}",str];
// [[NSUserDefaults standardUserDefaults] setValue:nil forKey:@"WRONGANSWER"];
NSLog(@"request string:%@",requestString);
NSData *requestData = [NSData dataWithBytes: [requestString UTF8String] length: [requestString length]];
NSString *fileLoc = [[NSBundle mainBundle] pathForResource:@"URLName" ofType:@"plist"];
NSDictionary *fileContents = [[NSDictionary alloc] initWithContentsOfFile:fileLoc];
NSString *urlLoc = [fileContents objectForKey:@"URL"];
urlLoc = [urlLoc stringByAppendingString:@"?lastupdate=2012-09-01 01:00:00"];
NSLog(@"URL : %@",urlLoc);
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:
[NSURL URLWithString: urlLoc]];
NSString *postLength = [NSString stringWithFormat:@"%d", [requestData length]];
[request setHTTPMethod: @"POST"];
[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
[request setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
[request setHTTPBody: requestData];
NSError *respError = nil;
NSData *returnData = [NSURLConnection sendSynchronousRequest: request returningResponse: nil error: &respError ];
if (respError)
{
// NSString *msg = [NSString stringWithFormat:@"Connection failed! Error - %@ %@",
// [respError localizedDescription],
// [[respError userInfo] objectForKey:NSURLErrorFailingURLStringErrorKey]];
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"ACTEC"
message:@"check your network connection" delegate:self cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alertView show];
}
else
{
NSUserDefaults *dd = [NSUserDefaults standardUserDefaults];
NSString *responseString = [[NSString alloc] initWithData:returnData encoding: NSUTF8StringEncoding];
NSLog(@"Resp : %@",responseString);
NSDictionary *results = [responseString JSONValue];
NSLog(@"results=%@",results);
}
}
You might want to look into using a library. AFNetworking provides a class called AFHTTPClient that allows you to connect to a restful web service and make simple calls to it. Assuming an end point, you can do something like this:
NSDictionary *body = [NSDictionary dictionaryWitObject:@"LastUpdated" forKey:@"LastUpdated"];
NSString *fileLoc = [[NSBundle mainBundle] pathForResource:@"URLName" ofType:@"plist"];
NSDictionary *fileContents = [[NSDictionary alloc] initWithContentsOfFile:fileLoc];
NSString *urlLoc = [fileContents objectForKey:@"URL"];
urlLoc = [urlLoc stringByAppendingString:@"?lastupdate=2012-09-01 01:00:00"];
AFHTTPClient *client = [AFHTTPClient clientWithBaseURL:[NSURL URLWithString:urlLoc]];
[client postPath:@"endpoint" parameters:body success:^(AFHTTPRequestOperation *operation, id responseObject) {
// Do something with the responseObject
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
// Log the error and proceed
}];
You can find the docs here: http://engineering.gowalla.com/AFNetworking/Classes/AFHTTPClient.html
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