Good morning,
How can I load a MySQL query result into a UILabel in my iOS app? I need to display the name of the user, the followers and also the profile image. How can I do that?
I have created the storyboard with the UILabels and the UIImageView but now I need to load the data from my MySQL database and I'm a little bit lost.
Thanks in advance.
You can get data with JSON.
NSMutableURLRequest * requestTransfer;
NSString *strUrl = #"www.yoursite.com/Mobile/GetUser";
requestTransfer = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:strUrl]
cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:60];
[requestTransfer setValue:#"gzip" forHTTPHeaderField:#"Accept-Encoding"];
[requestTransfer setHTTPMethod:#"POST"];
NSHTTPURLResponse * response;
NSError* error = nil;
response = nil;
NSData * data = [NSURLConnection sendSynchronousRequest:requestTransfer returningResponse:&response error:&error];
NSDictionary *dicUsers = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error];
You can use dictionary like that.
NSString* strID = [dictionary objectForKey:#"UserID"];
NSString* strName = [dictionary objectForKey:#"UserName"];
NSString* strLink = [dictionary objectForKey:#"ImageLink"];
yourlabel.text = strName;
Related
I am trying to get XML From a web services doing the following:
NSString *areaDescriptionWSpaceCharacters = [areaDescription componentsJoinedByString:#","];
areaDescriptionWSpaceCharacters = [areaDescriptionWSpaceCharacters stringByReplacingOccurrencesOfString:#" " withString:#"%20"];
NSString *requestString = [NSString stringWithFormat:#"%#?areaDescriptionPLXml=%#",kIP,areaDescriptionWSpaceCharacters];
NSURL *JSONURL = [NSURL URLWithString:requestString];
NSURLResponse* response = nil;
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:JSONURL];
NSData* data = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:nil];
if(data == nil)
return nil;
NSError *myError;
NSDictionary *punchList = [[NSDictionary alloc]initWithDictionary:[NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&myError]];
but I get this error:
[0] (null) #"NSDebugDescription" : #"JSON text did not start with array or object and option to allow fragments not set." for `myError`
Here is my XML:
<ArrayOfKeyValueOfstringPunchListCellModel84zsBx89>
<KeyValueOfstringPunchListCellModel84zsBx89>
<Key>ORC0023</Key>
<Value>
<baseOrSchedStartList>
<string>2015-09-11T08:00:00</string>
<string>2015-08-10T16:00:00</string>
<string>2015-08-11T16:00:00</string>
</baseOrSchedStartList>
</Value>
</KeyValueOfstringPunchListCellModel84zsBx89>
</ArrayOfKeyValueOfstringPunchListCellModel84zsBx89>
What am I doing wrong?
Your XML is... an XML. Not a JSON.
Try using a 3rd party such as this:
https://github.com/nicklockwood/XMLDictionary
for XML parsing.
I have a problem I can't deal with.
In my application, I get datas from my Web Service in JSON. It's UTF8-encoded and when I fill an UITableView everything is ok (NSLog return accents like : "\u00e9" but my UITableView shows it like : "é").
But when I set the same data in my detailTextLabel, it doesn't convert "\u00e9" to "é" ...
Tried some tricks with encoding, but nothing convincing.
Parsing methods :
- (NSDictionary*)fetchedData:(NSData *)responseData {
NSError* error;
self.json = [NSJSONSerialization
JSONObjectWithData:responseData
options:kNilOptions
error:&error];
return self.json;
}
-(void)executeParsingWithUrl:(NSURL*)anUrl{
NSMutableURLRequest *urlRequest = [[NSMutableURLRequest alloc] initWithURL:anUrl];
NSString *authStr = [NSString stringWithFormat:#"%#:%#",[[NSUserDefaults standardUserDefaults] stringForKey:#"username_ws"], [[NSUserDefaults standardUserDefaults] stringForKey:#"password_ws"]];
NSData *authData = [authStr dataUsingEncoding:NSASCIIStringEncoding];
NSString *authValue = [NSString stringWithFormat:#"Basic %#", [Base64 encode:authData]];
[urlRequest setValue:authValue forHTTPHeaderField:#"Authorization"];
NSError *requestError = NULL;
NSHTTPURLResponse *response = NULL;
NSData *responseData = [NSURLConnection sendSynchronousRequest:urlRequest returningResponse:&response error:&requestError];
[self performSelectorOnMainThread:#selector(fetchedData:)
withObject:responseData waitUntilDone:YES];
}
Recuperation :
dispatch_async(dispatch_get_global_queue( DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
JsonParsing *getJson = [[JsonParsing alloc] init];
[getJson executeParsingWithUrl: leUrl];
self.duration = [NSString stringWithFormat:#"%#",[[getJson.json objectForKey:#"objects"]valueForKey:#"libel"]];
});
Thanks in advance !
I managed it thanks to other people.
I my cell.detailTextLabel I used this :
cell.detailTextLabel.text = [NSString stringWithCString:[myText cStringUsingEncoding:NSUTF8StringEncoding] encoding:NSNonLossyASCIIStringEncoding];
I have created a small project that can read and insert data from iPhone to sql server via RESTful WCF service.
I have read the data successfully with the following approach:
1- I have created a wcf web service that read data from Sql serverwith table Employees(firstname,lastname,salary):
"41.142.251.142/JsonWcfService/GetEmployees.svc/json/employees"
2- I have created a new project in xcode 5.0.2, and I added a textfield (viewData.text) to display data retrieved by the web service.
3- I added the following instruction in my viewController.m :
"#define WcfSeviceURL [NSURL URLWithString: #"41.142.251.142/JsonWcfService/GetEmployees.svc/json/employees"]"
3- In (void)viewDidLoad method, I implemented the below code:
- (void)viewDidLoad
{
[super viewDidLoad];
NSError *error = nil;
NSData *data = [NSData dataWithContentsOfURL:WcfSeviceURL options:NSDataReadingUncached error:&error];
if(!error)
{
NSDictionary* json = [NSJSONSerialization
JSONObjectWithData:data
options:NSJSONReadingMutableContainers
error:&error];
NSMutableArray *array= [json objectForKey:#"GetAllEmployeesMethodResult"];
for(int i=0; i< array.count; i++)
{
NSDictionary *empInfo= [array objectAtIndex:i];
NSString *first = [empInfo objectForKey:#"firstname"];
NSString *last = [empInfo objectForKey:#"lastname"];
NSString *salary = [empInfo objectForKey:#"salary"];
//Take out whitespaces from String
NSString *firstname = [first
stringByReplacingOccurrencesOfString:#" " withString:#""];
NSString *lastname = [last
stringByReplacingOccurrencesOfString:#" " withString:#""];
viewData.text= [viewData.text stringByAppendingString:[NSString stringWithFormat:#"%# %# makes $%#.00 per year.\n",firstname,lastname,salary]];
}
}
}
Check the following link : http://www.codeproject.com/Articles/405189/How-to-access-SQL-database-from-an-iPhone-app-Via.
As I mentioned, I can read the data from my iPhone without any problem.
So the second step is how to write and insert data from the iPhone to sql server.
for this, I created first the method that insert data in my webservice:
In WCF interface:
[OperationContract]
[WebInvoke(Method = "POST",
ResponseFormat = WebMessageFormat.Json,
RequestFormat = WebMessageFormat.Json,
BodyStyle = WebMessageBodyStyle.Wrapped,
UriTemplate = "json/InsertEmployee/{id1}/{id2}/{id3}")]
bool InsertEmployeeMethod(string id1,string id2, string id3);
In Implementation:
public bool InsertEmployeeMethod(string id1,string id2, string id3)
{
int success = 0;
using (SqlConnection conn = new SqlConnection("server=(local);database=EmpDB;Integrated Security=SSPI;"))
{
conn.Open();
decimal value= Decimal.Parse(id3);
string cmdStr = string.Format("INSERT INTO EmpInfo VALUES('{0}','{1}',{2})",id1,id2,value);
SqlCommand cmd = new SqlCommand(cmdStr, conn);
success = cmd.ExecuteNonQuery();
conn.Close();
}
return (success != 0 ? true : false);
}
So to test this web servcie method use:
"41.142.251.142/JsonWcfService/GetEmployees.svc/json/InsertEmployee/myName/MylastName/6565"
Then to consume this method from iPhone I used the following approach:
I decalared the Define Instruction:
"#define BaseWcfUrl [NSURL URLWithString:
#"41.142.251.142/JsonWcfService/GetEmployees.svc/json/InsertEmployee/{id1}/{id2}/{id3}"]"
Then I implemented the Insert Employee Method related to click button.
-(void) insertEmployeeMethod
{
if(firstname.text.length && lastname.text.length && salary.text.length)
{
NSString *str = [BaseWcfUrl stringByAppendingFormat:#"InsertEmployee/%#/%#/%#",firstname.text,lastname.text,salary.text];
NSURL *WcfServiceURL = [NSURL URLWithString:str];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:WcfServiceURL];
[request setHTTPMethod:#"POST"];
// connect to the web
NSData *respData = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
// NSString *respStr = [[NSString alloc] initWithData:respData encoding:NSUTF8StringEncoding];
NSError *error;
NSDictionary* json = [NSJSONSerialization
JSONObjectWithData:respData
options:NSJSONReadingMutableContainers
error:&error];
NSNumber *isSuccessNumber = (NSNumber*)[json objectForKey:#"InsertEmployeeMethodResult"];
//create some label field to display status
status.text = (isSuccessNumber && [isSuccessNumber boolValue] == YES) ? [NSString stringWithFormat:#"Inserted %#, %#",firstname.text,lastname.text]:[NSString stringWithFormat:#"Failed to insert %#, %#",firstname.text,lastname.text];
}
}
But the issue here, is in the following instruction:
NSString *str = [BaseWcfUrl stringByAppendingFormat:#"InsertEmployee/%#/%#/%#",firstname.text,lastname.text,salary.text];
Always the system returns a message 'Data parameter nil' with this line, knowing that the firstname.text, and lastname.text, salary are all filled and I can see their values with NSLog(#"First Name :%#",firstname.text)...
Can you please help on this?
Thanks in advance.
I don't think NSURLs stringByAppendingFormat will do what you want.
Try something like this:
#define kBase_URL #"41.142.251.142/JsonWcfService/GetEmployees.svc/json/%#"
#define kAuthAPI_InsertEmployee_URL [NSString stringWithFormat:kBase_URL, #"InsertEmployee/%#/%#/%#"]
//Setup session
NSError *error;
NSURL *requestURL = [NSURL URLWithString:[NSString stringWithFormat:kAuthAPI_InsertEmployee_URL,firstname.text,lastname.text,salary.text]];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:requestURL cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0];
[request addValue:#"application/json" forHTTPHeaderField:#"Content-Type"];
[request addValue:#"application/json" forHTTPHeaderField:#"Accept"];
[request setHTTPMethod:#"POST"];
NSData *postData = [NSJSONSerialization dataWithJSONObject:profileData options:0 error:&error];
[request setHTTPBody:postData];
etc. etc.
I am trying to store data from server to NSMutable array to display them as news feeds in table view like shown in this image. Basically like twitter news feeds. What I wanna do is get the data from the server in the NSMutable array and use that array to display in my table view. I don't know if this is the right way to do it. I tried adding statically and it works but I really don't know how to do it dynamically since I'm a newbie to Objective C. Sorry if this question seems really stupid. Thanks in advance!
Parse data using JSON:
dispatch_queue_t jsonParsingQueue = dispatch_queue_create("jsonParsingQueue", NULL);
// execute a task on that queue asynchronously
dispatch_async(jsonParsingQueue, ^{
NSString *urlStr = #"YourURL";
NSURL *url = [NSURL URLWithString:[urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc]initWithURL: url];
[request setHTTPMethod: #"GET"];
NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];
NSString *responseStr = [[NSString alloc] initWithData:response encoding:NSUTF8StringEncoding];
NSData * jsonData = [responseStr dataUsingEncoding:NSUTF8StringEncoding];
NSMutableArray *tempResults = [NSMutableArray alloc];
NSError *jsonParsingError = nil;
NSDictionary *jsonObject = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:&jsonParsingError];
tempResults = jsonObject[#"posts"]; //Add the json key you would like to get
self.arrayToDisplay = [tempResults copy]; //copy them to your NSMutableArray
// some code on a main thread (delegates, notifications, UI updates...)
dispatch_async(dispatch_get_main_queue(), ^{
[self.myTableView reloadData];
});
});
am starting to build login form reading from external server via http request i need to parse json result to get user name
- (IBAction)getlogin:(UIButton *)sender {
NSString *rawStrusername = [NSString stringWithFormat:#"username=%#",_username.text];
NSString *rawStrpassword = [NSString stringWithFormat:#"password=%#",_password.text];
NSString *post = [NSString stringWithFormat:#"%#&%#", rawStrusername, rawStrpassword];
// NSString *post = #"rawStrusername&rawStrpassword";
NSData *postData = [post dataUsingEncoding:NSASCIIStringEncoding allowLossyConversion:YES];
/* NSString *postLength = [NSString stringWithFormat:#"%d", [postData length]]; */
NSURL *url = [NSURL URLWithString:#"http://www.othaimmarkets.com/my_services_path/user/login.json"];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
[request setHTTPMethod:#"POST"];
/* [request setValue:postLength forHTTPHeaderField:#"Content-Length"]; */
[request setValue:#"application/x-www-form-urlencoded" forHTTPHeaderField:#"Content-Type"];
[request setHTTPBody:postData];
NSURLResponse *response;
NSError *err;
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&err];
NSLog(#"responseData: %#", [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding]);
//NSLog(#"responseData: %#", responseData);
}
I get this result:
{"sessid":"g2ev7til6d750ducrkege0cbj2","session_name":"SESS02795057fe9e6b2fc0777bf4057b248f","user":{"uid":"617","name":"mohammed.abdelrasoul#gmail.com","mail":"mohammed.abdelrasoul#gmail.com","mode":"0","sort":"0","threshold":"0","theme":"","signature":"","signature_format":"0","created":"1316602317","access":"1352643854","login":"1352666338","status":"1","timezone":"10800","language":"ar","picture":"","init":"mohammed.abdelrasoul#gmail.com","data":"a:5:{s:18:\"country_iso_code_2\";s:2:\"SA\";s:13:\"timezone_name\";s:11:\"Asia/Riyadh\";s:5:\"block\";a:1:{s:7:\"webform\";a:1:{s:15:\"client-block-88\";i:1;}}s:13:\"form_build_id\";s:37:\"form-3ae73833f08accc7abe5517347ea87eb\";s:7:\"contact\";i:0;}","country_iso_code_2":"SA","timezone_name":"Asia/Riyadh","block":{"webform":{"client-block-88":1}},"form_build_id":"form-3ae73833f08accc7abe5517347ea87eb","contact":0,"roles":{"2":"authenticated user"}}}
Or, formatted for the sake of legibility:
{
"sessid":"g2ev7til6d750ducrkege0cbj2",
"session_name":"SESS02795057fe9e6b2fc0777bf4057b248f",
"user":{
"uid":"617",
"name":"mohammed.abdelrasoul#gmail.com",
"mail":"mohammed.abdelrasoul#gmail.com",
"mode":"0",
"sort":"0",
"threshold":"0",
"theme":"",
"signature":"",
"signature_format":"0",
"created":"1316602317",
"access":"1352643854",
"login":"1352666338",
"status":"1",
"timezone":"10800",
"language":"ar",
"picture":"",
"init":"mohammed.abdelrasoul#gmail.com",
"data":"a:5:{s:18:\"country_iso_code_2\";s:2:\"SA\";s:13:\"timezone_name\";s:11:\"Asia/Riyadh\";s:5:\"block\";a:1:{s:7:\"webform\";a:1:{s:15:\"client-block-88\";i:1;}}s:13:\"form_build_id\";s:37:\"form-3ae73833f08accc7abe5517347ea87eb\";s:7:\"contact\";i:0;}",
"country_iso_code_2":"SA",
"timezone_name":"Asia/Riyadh",
"block":{
"webform":{
"client-block-88":1
}
},
"form_build_id":"form-3ae73833f08accc7abe5517347ea87eb",
"contact":0,
"roles":{
"2":"authenticated user"
}
}
}
how i can get the objects data or parse the result to get user name
any help or examples will be appreciated
You need to use the NSJSONSerialization class method, JSONObjectWithData:options:error: to create an NSDictionary:
NSError *error;
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:responseData options:NSJSONReadingMutableContainers error:&error];
if (! error) {
NSLog(#"%#",jsonDict);
}else{
NSLog(#"%#",error.localizedDescription);
}
This will get you to the point where you can look at the dictionary, which will be easier to read. It looks like you need to use objectForKey:#"sessid" to get you to user, then objectForKey#"user", then objectForKey:#"name" to get you to the name.
Check out this framework for parsing json. https://github.com/stig/json-framework/
Also check out this answer iPhone/iOS JSON parsing tutorial. You'll find a link to a tutorial you can do to get acquainted with json parsing in ios.
See this answer and some code :
NSMutableData *data; // Contains data received from the URL connection declares in header
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)dataIn
{
// Do it this way because connection doesn't guarantee all the data is in
POLLog(#" Tide View connection");
[data appendData:dataIn];
}
- (void) connectionDidFinishLoading:(NSURLConnection *) conn
{
NSString *jsonString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
NSDictionary *results = [jsonString JSONValue]; // This is a new category added to the NSString by SBJSON
//100 parameters
for (int n=0;n<=100;n++)
{
// Get all the returned results
params[n] = [[results objectForKey:[NSString stringWithFormat:#"param%d",n]] floatValue];
}
To expand upon rdelmar's answer (which I think you should accept), you can use NSJSONSerialization and then navigate the NSDictionary results to extract the userName:
NSError *error;
NSDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:responseData
options:0
error:&error];
if (error == nil) {
NSDictionary *userDictionary = [jsonDict objectForKey:#"user"];
NSString *userName = [userDictionary objectForKey:#"name"];
// do what you need with the userName
} else {
NSLog(#"%#",error.localizedDescription);
}
Or if using the latest version of Xcode, you can replace those objectForKey references with the even more concise Modern Objective-C syntax:
NSDictionary *userDictionary = jsonDict[#"user"];
NSString *userName = userDictionary[#"name"];