CODEWITHSUNDEEP
phpmysqliosiphonejson
Mike_NotGuilty
Mike_NotGuilty

Reputation: 2395

Simple JSON php request iPhone

i want to step into the mySQL, JSON iPhone world. I set up a simple weather station with my Arduino and send the temperature to my MySQL database. I created a php file on my server.

When i open the file in Safari it looks like this:

{"weatherstation":[{"location":"indoor","celsius":"22.85"}]}

Now i want to create a simple Application for my iPhone which displays the temperature. Can someone help me out some code? I searched here on stack overflow, but the most people are more advanced than i am.

Almost every code began with:

dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
    NSURL *url = [NSURL URLWithString:@"http://myWebsite.com/myPHPFile.php"];
    NSError *error = nil;

I would be very thankful if someone could help me to step into this topic.

EDIT

Here is some code of my php file. how can i change it to a JSON type? i tried it with

header('Content-Type: application/json');

But afterwards my php file shows the whole html structure (< html>...< /html>). do i have to change the html part if i change the content type to json?

<?php

...

header('Content-Type: application/json'); 

...

<!DOCTYPE HTML>
<html>
<head>
  <meta http-equiv="Content-Type" content="application/json; charset=utf-8">
  <meta name="viewport" content="user-scalable=yes, width=device-width"> 
  <title>My Temperature</title>
</head>
<body>
 <?php
if(!isset($E)) 
{
?>
{"weatherstation":[{"location":"indoor","celsius":"<?php echo $temp;?>"}]}
<?php           
} 
else 
{
  echo $M;
}
?>   
</body>
</html>

Upvotes: 1

Views: 379

Answers (2)

iphonic
iphonic

Reputation: 12719

Using following code you can easily get your json data work

-(void)viewDidLoad{
     //Call function to fetch temperature

     dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
        [self getTemperature];
     });
}


-(void)getTemperature{

    NSData *jsonData=[NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://myWebsite.com/myPHPFile.php"]];

    if(jsonData){

        NSJSONSerialization *result=[NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments error:nil];

        //Here you get your json parsed        
        NSDictionary *json=(NSDictionary *)result;

        //Get the weather array from your json
        NSArray *arrWeather=[json objectForKey:@"weatherstation"];

        //Loop to get the values

        for(NSDictionary *weather in arrWeather){
             NSLog(@"Temp for Location %@ is %@",[weather objectForKey:@"location"],[weather objectForKey:@"celsius"]);
        }

   }
}

Edit

You PHP should look like below you can use this version directly as I have removed leading space from the code

<?php
    header('Content-Type: application/json');

    if(!isset($E))
    {
?>
{"weatherstation":[{"location":"indoor","celsius":"<?php echo $temp;?>"}]}
<?php
    } 
    else
    {
      echo $M;
    }
?>

Upvotes: 1

yoeriboven
yoeriboven

Reputation: 3571

Include AFNetworking in your project, import "AFHTTPRequestOperationManager.h" and "AFURLResponseSerialization.h" in your file and use the following code:

AFHTTPRequestOperationManager *manager = [[AFHTTPRequestOperationManager manager] initWithBaseURL:BASE_URL];
[manager setResponseSerializer:[AFJSONResponseSerializer serializer]];

NSDictionary *parameters = @{@"username" : @"john123", @"type" : @"login"};
[manager POST:@"data.php" parameters:parameters success:^(AFHTTPRequestOperation *operation, id responseObject){
    NSLog(@"response: %@", responseObject);
} failure:^(AFHTTPRequestOperation *operation, NSError *error){
    NSLog(@"error: %@", error);
}];

Upvotes: 1

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