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我正在嘗試執行三種不同的JSON連接來使用三個不同的MySQL表格標記填充mapView。JSON連接在地圖上顯示標記查看
這是我現在要做的代碼。爲了測試連接，我正在記錄didReceiveData方法，但編譯器光標沒有到達該方法，當然，任何標記都顯示在地圖上。
您懇請看看我的代碼，並告訴我我錯過了什麼或做錯了什麼。謝謝。
- (void)viewDidLoad
{
[super viewDidLoad];
self.title = @"Geolocalización";
//carga de datos JSON
//network activity indicator showed during downloading data
//PROCESSING FIRST CONNECTION
first_connection_url = [NSURL URLWithString:@"http://mujercanariasigloxxi.appgestion.eu/app_php_files/empresastodaslist.php"];
NSURLRequest *first_connection_request = [NSURLRequest requestWithURL:first_connection_url];
NSURLConnection *first_connection=[[NSURLConnection alloc]initWithRequest:first_connection_request delegate:self];
//PROCESSING SECOND CONNECTION
second_connection_url = [NSURL URLWithString:@"http://mujercanariasigloxxi.appgestion.eu/app_php_files/centrostodoslist.php"];
NSURLRequest *second_connection_request = [NSURLRequest requestWithURL:second_connection_url];
NSURLConnection *second_connection=[[NSURLConnection alloc]initWithRequest:second_connection_request delegate:self];
//PROCESSING THIRD CONNECTION
third_connection_url = [NSURL URLWithString:@"http://mujercanariasigloxxi.appgestion.eu/app_php_files/eventostodoslist.php"];
NSURLRequest *thrid_connection_request = [NSURLRequest requestWithURL:third_connection_url];
NSURLConnection *third_connection=[[NSURLConnection alloc]initWithRequest:second_connection_request delegate:self];
}
//methods to perform the connection and population of data
-(void)connection: (NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
if(connection==first_connection){
data_for_first_connection = [[NSMutableData alloc]init];
}
else if(connection==second_connection){
data_for_second_connection = [[NSMutableData alloc]init];
}
else if(connection==third_connection){
data_for_third_connection = [[NSMutableData alloc]init];
}
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)thedata
{
if(connection==first_connection){
[data_for_first_connection appendData:thedata];
NSLog(@"CONEXION 1 AQUI");
}
else if(connection==second_connection){
[data_for_second_connection appendData:thedata];
NSLog(@"CONEXION 2 AQUI");
}
else if(connection==third_connection){
[data_for_third_connection appendData:thedata];
NSLog(@"CONEXION 3 AQUI");
}
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
//if data received network indicator not visible
[UIApplication sharedApplication].networkActivityIndicatorVisible=NO;
if(connection==first_connection) {
categorias_first = [NSJSONSerialization JSONObjectWithData:data_for_first_connection options:0 error:nil];
}
else if(connection==second_connection){
categorias_second = [NSJSONSerialization JSONObjectWithData:data_for_second_connection options:0 error:nil];
}
else if(connection==third_connection){
// PROCESS TO BE DONE FOR SECOND CONNECTION
categorias_third = [NSJSONSerialization JSONObjectWithData:data_for_third_connection options:0 error:nil];
}
// Create a GMSCameraPosition that tells the map to display the
// coordinate -33.86,151.20 at zoom level 6.
GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:27.9847
longitude:-15.5953
zoom:9];
mapView_ = [GMSMapView mapWithFrame:CGRectZero camera:camera];
mapView_.myLocationEnabled = YES;
mapView_.delegate = self;
self.view = mapView_;
UISegmentedControl *mainSegment = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:@"Ofertas", @"Cursos", @"Eventos", nil]];
[mainSegment setSegmentedControlStyle:UISegmentedControlStyleBar];
mainSegment.frame = CGRectMake(20,80, 280, 43);
//self.navigationItem.titleView = mainSegment;
//mainSegment.selectedSegmentIndex = nil;
[mainSegment addTarget:self action:@selector(mainSegmentControl:) forControlEvents: UIControlEventValueChanged];
[self.view addSubview:mainSegment];
}
更新的測試應用程序的代碼。
我已更新我的代碼來測試它，現在我只使用兩個連接。在記錄結果，我發現，數組categoria（在first_connection）和categoria2（在second_connection）是由相同的JSON文件（從first_connection）填充：
- (void)viewDidLoad
{
[super viewDidLoad];
self.title = @"Geolocalización";
//carga de datos JSON
//network activity indicator showed during downloading data
[UIApplication sharedApplication].networkActivityIndicatorVisible=YES;
//URL definition where php file is hosted
//conexion1
url = [NSURL URLWithString:@"http://mujercanariasigloxxi.appgestion.eu/app_php_files/empresastodaslist.php"];
request = [NSURLRequest requestWithURL:url];
first_connection = [[NSURLConnection alloc] initWithRequest:request delegate:self];
//conexion2
url2 = [NSURL URLWithString:@"http://mujercanariasigloxxi.appgestion.eu/app_php_files/centrostodoslist.php"];
request2 = [NSURLRequest requestWithURL:url];
second_connection = [[NSURLConnection alloc] initWithRequest:request2 delegate:self];
}
//methods to perform the connection and population of data
-(void)connection: (NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response
{
if ([connection isEqual:first_connection]){
NSLog(@"FIRST CONNECTION RESPONSE");
data = [[NSMutableData alloc]init];
}
if ([connection isEqual:second_connection]){
NSLog(@"SECOND CONNECTION RESPONSE");
data2 = [[NSMutableData alloc]init];
}
NSLog(@"ESTOY EN DIDRECEIVERESPONSE");
}
-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)thedata
{
if ([connection isEqual:first_connection]){
NSLog(@"FIRST CONNECTION RECEIVED");
[data appendData:thedata];
}
if ([connection isEqual:second_connection]){
NSLog(@"SECOND CONNECTION RECEIVED");
[data2 appendData:thedata];
}
}
-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
//if data received network indicator not visible
[UIApplication sharedApplication].networkActivityIndicatorVisible=NO;
//array waterfalls populated via JSON from database
if ([connection isEqual:first_connection]){
categorias = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];
NSLog(@"DATA1 = %@",categorias);
}
if ([connection isEqual:second_connection]){
categorias2 = [NSJSONSerialization JSONObjectWithData:data2 options:0 error:nil];
NSLog(@"DATA2 = %@",categorias2);
}
NSLog(@"NUMERO DE EMPRESAS OPCION1= %lu"
, (unsigned long)[categorias count]);
NSLog(@"NUMERO DE EMPRESAS OPCION2= %lu"
, (unsigned long)[categorias2 count]);
// Create a GMSCameraPosition that tells the map to display the
// coordinate -33.86,151.20 at zoom level 6.
GMSCameraPosition *camera = [GMSCameraPosition cameraWithLatitude:27.9847
longitude:-15.5953
zoom:9];
mapView_ = [GMSMapView mapWithFrame:CGRectZero camera:camera];
mapView_.myLocationEnabled = YES;
mapView_.delegate = self;
self.view = mapView_;
UISegmentedControl *mainSegment = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects:@"Ofertas", @"Cursos", @"Eventos", nil]];
[mainSegment setSegmentedControlStyle:UISegmentedControlStyleBar];
mainSegment.frame = CGRectMake(20,80, 280, 43);
//self.navigationItem.titleView = mainSegment;
//mainSegment.selectedSegmentIndex = nil;
[mainSegment addTarget:self action:@selector(mainSegmentControl:) forControlEvents: UIControlEventValueChanged];
[self.view addSubview:mainSegment];
}
你可以嘗試使用'connectionWithRequest'而不是'initWithRequest'。 – user2071152
謝謝@ user2071152，我現在就試試，但我想這不是問題。首先，我嘗試了只有一個連接，它工作正常。 – mvasco
@ user2071152，您的提議會引發編譯器錯誤。 – mvasco