我回到了几年前在 Xcode 中开始的一个项目。这是我的第一个 Xcode 项目，需要相当长的学习时间，但我最终让该应用程序按预期运行。我现在已经返回项目以添加一些功能，但是我无法返回并准确理解我的代码是如何运行的。该应用程序现在所做的基本上是与 mySQL 数据库通信，并显示数据库中用户选择的任何位置的数据。我现在想添加一个功能，用户可以在其中编辑此数据/将数据添加到数据库中。到目前为止，我一直找不到任何有用的教程或解决方案。这是我用于存储数据库数据的代码。
//
// City.h
// webView
//
// Created by 1234 on 14-04-07.
// Copyright (c) 2014 1234. All rights reserved.
//
#import <Foundation/Foundation.h>
@interface City : NSObject
@property (nonatomic, strong)NSString * cityName;
@property (nonatomic, strong)NSString * clubName;
@property (nonatomic, strong)NSString * clubLine;
@property (nonatomic, strong)NSString * cityID;
@property (nonatomic, strong)NSString * cityCountry;
@property (nonatomic, strong)NSString * price;
@property (nonatomic, strong)NSString * camera;
@property (nonatomic, strong)NSString * taxi;
@property (nonatomic, strong)NSString * promo;
@property (nonatomic, strong)NSNumber * Latitude;
@property (nonatomic, strong)NSNumber * Longitude;
-(id)initWithCityName: (NSString *)cName andCityCountry: (NSString *)cCountry andClubName: (NSString *)clName andClubLine: (NSString *)cLine andPrice: (NSString *)pri andPromo: (NSString *)prom andCamera: (NSString *)cam andTaxi:(NSString *)taxi andLatitude: (NSNumber *)cLatitude andLongitude: (NSNumber *)cLongitude andCityId: (NSString *)cID ;
@end
//
//
// City.m
// webView
//
// Created by 1234 on 14-04-07.
// Copyright (c) 2014 1234. All rights reserved.
//
#import "City.h"
@implementation City
@synthesize cityCountry, cityID, Latitude, Longitude, cityName, clubName, clubLine,taxi, price,promo,camera;
-(id)initWithCityName: (NSString *)cName andCityCountry: (NSString *)cCountry andClubName: (NSString *)clName andClubLine: (NSString *)cLine andPrice: (NSString *)pri andPromo: (NSString *)prom andCamera: (NSString *)cam andTaxi:(NSString *)tax andLatitude: (NSNumber *)cLatitude andLongitude: (NSNumber *)cLongitude andCityId: (NSString *)cID ;
{
self=[super init];
if(self)
{
cityName=cName;
cityCountry=cCountry;
clubName= clName;
clubLine=cLine;
price=pri;
promo=prom;
camera=cam;
Latitude= cLatitude;
Longitude= cLongitude;
cityID=cID;
taxi= tax;
}
return self;
}
@end
//-(void)retrieveData将数据存储在jsonArray中
//
// ViewController.m
// webView
//
// Created by 1234 on 14-04-06.
// Copyright (c) 2014 1234. All rights reserved.
//
#import "ViewController.h"
#import "DetailController.h"
#import "Annotation.h"
#import "City.h"
@interface ViewController (){
MKLocalSearch *localSearch;
MKLocalSearchResponse *results;
}
@property (nonatomic, strong) IBOutlet DetailController *detailViewController;
@end
#define getDatalURL @"http://www.club-hop.com/apptest.php"
@implementation ViewController
@synthesize mapView,jsonArray,citiesArray;
- (void)viewDidLoad
{
[super viewDidLoad];
[self retrieveData];
self.edgesForExtendedLayout=UIRectEdgeNone;
self.detailViewController = [[DetailController alloc] init];
[self.searchDisplayController setDelegate:self];
[self.ibSearchBar setDelegate:self];
//Zoom the map to current location.
[self.mapView setShowsUserLocation:YES];
[self.mapView setUserInteractionEnabled:YES];
[self.mapView setUserTrackingMode:MKUserTrackingModeFollow];
City * cityObject;
// load external page into UIWebView
NSMutableArray * locations= [[NSMutableArray alloc]init];
CLLocationCoordinate2D location;
Annotation * myAnn;
for(int u=0; u<citiesArray.count;u++){
cityObject=[citiesArray objectAtIndex:u];
myAnn=[[Annotation alloc]init];
myAnn.city=cityObject; // Store the city object on the annotation
NSNumber *aLat= cityObject.Latitude;
NSNumber *aLon= cityObject.Longitude;
NSString *cab= cityObject.taxi;
double lat = [aLat doubleValue];
double lon = [aLon doubleValue];
location.latitude= lat;
location.longitude=lon;
myAnn.coordinate = location;
myAnn.title=cityObject.clubName;
myAnn.subtitle=cityObject.cityName;
[locations addObject:myAnn];}
[self.mapView addAnnotations:locations];
}
- (BOOL)prefersStatusBarHidden
{
return YES;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
//class methods
-(void) retrieveData{
NSURL * url= [NSURL URLWithString:getDatalURL];
NSData * data= [NSData dataWithContentsOfURL:url];
jsonArray= [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil];
//setup cities array
citiesArray=[[NSMutableArray alloc]init];
for(int i=0; i<jsonArray.count;i++){
NSString * cID= [[jsonArray objectAtIndex:i] objectForKey:@"id"];
NSString * cName= [[jsonArray objectAtIndex:i] objectForKey:@"cityName"];
NSString * cCountry= [[jsonArray objectAtIndex:i] objectForKey:@"cityCountry"];
NSString * cLine= [[jsonArray objectAtIndex:i] objectForKey:@"clubLine"];
NSString * pri=[[jsonArray objectAtIndex:i] objectForKey:@"price"];
NSString * promo=[[jsonArray objectAtIndex:i] objectForKey:@"promo"];
NSString * camera=[[jsonArray objectAtIndex:i] objectForKey:@"camera"];
NSString * taxi= [[jsonArray objectAtIndex:i] objectForKey:@"Taxi"];
NSString * clName= [[jsonArray objectAtIndex:i] objectForKey:@"clubName"];
NSNumber * cLatitude= [[jsonArray objectAtIndex:i] objectForKey:@"Latitude"];
NSNumber * cLongitude= [[jsonArray objectAtIndex:i] objectForKey:@"Longitude"];
[citiesArray addObject:[[City alloc]initWithCityName:cName andCityCountry:cCountry andClubName:clName andClubLine:cLine andPrice:pri andPromo:promo andCamera:camera andTaxi:taxi andLatitude:cLatitude andLongitude:cLongitude andCityId:cID]];
}
}
#pragma mark - MKMapViewDelegate
// user tapped the disclosure button in the callout
//
- (void)mapView:(MKMapView *)mapView annotationView:(MKAnnotationView *)view calloutAccessoryControlTapped:(UIControl *)control
{
UIStoryboard* storyboard = [UIStoryboard storyboardWithName:@"MainStoryboard"
bundle:nil];
self.detailViewController = [storyboard instantiateViewControllerWithIdentifier:@"Page2"];
Annotation *myAnnotation=(Annotation *)view.annotation;
self.detailViewController.city=myAnnotation.city;
[self.navigationController pushViewController:self.detailViewController animated:YES];
}
- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
MKAnnotationView *pin=nil;
if ([annotation isKindOfClass:[Annotation class]])
{
pin=(MKAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:@"myAnnotation"];
if (pin == nil)
{
pin=[[MKAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"myAnnotation"];
pin.rightCalloutAccessoryView = [UIButton buttonWithType:UIButtonTypeDetailDisclosure];
pin.image=[UIImage imageNamed:@"mappin.png"];
pin.centerOffset=CGPointMake(0.0, pin.image.size.height/-2);
pin.canShowCallout=YES;
}
}
return pin;
}
#pragma mark - Search Methods
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
// Cancel any previous searches.
[localSearch cancel];
// Perform a new search.
MKLocalSearchRequest *request = [[MKLocalSearchRequest alloc] init];
request.naturalLanguageQuery = searchBar.text;
request.region = self.mapView.region;
[UIApplication sharedApplication].networkActivityIndicatorVisible = YES;
localSearch = [[MKLocalSearch alloc] initWithRequest:request];
[localSearch startWithCompletionHandler:^(MKLocalSearchResponse *response, NSError *error){
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
if (error != nil) {
[[[UIAlertView alloc] initWithTitle:NSLocalizedString(@"Map Error",nil)
message:[error localizedDescription]
delegate:nil
cancelButtonTitle:NSLocalizedString(@"OK",nil) otherButtonTitles:nil] show];
return;
}
if ([response.mapItems count] == 0) {
[[[UIAlertView alloc] initWithTitle:NSLocalizedString(@"No Results",nil)
message:nil
delegate:nil
cancelButtonTitle:NSLocalizedString(@"OK",nil) otherButtonTitles:nil] show];
return;
}
results = response;
[self.searchDisplayController.searchResultsTableView reloadData];
}];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [results.mapItems count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *IDENTIFIER = @"SearchResultsCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:IDENTIFIER];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:IDENTIFIER];
}
MKMapItem *item = results.mapItems[indexPath.row];
cell.textLabel.text = item.name;
cell.detailTextLabel.text = item.placemark.addressDictionary[@"Street"];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
[self.searchDisplayController setActive:NO animated:YES];
MKMapItem *item = results.mapItems[indexPath.row];
[self.mapView setCenterCoordinate:item.placemark.location.coordinate animated:YES];
[self.mapView setUserTrackingMode:MKUserTrackingModeNone];
}
@end
同样，我现在想做的是接收用户的输入并编辑从 http://club-hop.com/apptest.php 检索的数据。 .任何帮助将不胜感激
最佳答案
好的，所以从 iOS 向 SQL DB 添加数据是小菜一碟!当谈到上传数据时，iOS 并没有做太多工作，您只需使用 HTTP POST 函数将数据发送到服务器上的 PHP 文件，然后 PHP 就可以完成繁重的工作!我现在给你一个例子:
NSString *urlString = [NSString stringWithFormat:@"http://www.example.com/postVar.php?var=%@", hold];
NSMutableURLRequest *request = [[NSMutableURLRequest alloc] init];
[request setURL:[NSURL URLWithString:urlString]];
[request setHTTPMethod:@"POST"];
NSMutableData *body= [NSMutableData data];
[request setHTTPBody:body];
NSError * e;
NSURLResponse *string;
NSData *returnData = [NSURLConnection sendSynchronousRequest:request returningResponse:&string error:&e];
NSString* returnString= [[NSString alloc] initWithData:returnData encoding:NSUTF8StringEncoding];
NSLog(@"%@", returnString);
现在对于 PHP，这将是一个名为 postVar.php 的文件
<?php
//Set Server Details
$servername = "localhost";
$username = "tester";
$dbname = "myDB";
$password = "passw0rd";
/*For security reasons, you should get your password from iOS as well, using a GET function, but this is easier for a demo.*/
//Get Value From iOS
$var = $_GET['var'];
//SQL
// Create connection
$conn = mysqli_connect($servername, $username, $password, $dbname);
// Check connection
if (!$conn) {
die("Connection failed: " . mysqli_connect_error());
}
$sql = "INSERT INTO tablename (UserVariable) VALUES ('$var')";
if (mysqli_query($conn, $sql)) {
echo "Awesome. This works!";
//This is what your app will receive as the variable returnData
} else {
echo "Oops. Error!";
}
mysqli_close($conn);
?>
关于php - Xcode在mysql数据库中编辑和添加数据，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/27183951/