将NSMutable数组导入映射注释

大家好我有一个由7列组成的mysql数据库，并且我有一个脚本读取它并提取数据作为JSON，我已将其拉入NSMutableArray，我希望能够使用这个数组在我的地图上设置注释，但我不知道这里要做什么，因为你可以看到我已经在这里定义了一个注释，显示没有问题，但我老实说不知道如何显示NSMutableArray项目？ NSMutable数组将有更多的信息比注释所需的信息，我只需要，坐标，标题和副标题，所以我怎么能做到这一点？这是我到目前为止的代码：将NSMutable数组导入映射注释

hazards.h

#import <Foundation/Foundation.h> 
#import <MapKit/MapKit.h> 

@interface Hazards : NSObject <MKAnnotation> 

@property (nonatomic, assign) CLLocationCoordinate2D coordinate; 
@property (nonatomic, copy) NSString *title; 
@property (nonatomic, copy) NSString *subtitle; 

@property (nonatomic, strong) NSString * ID; 
@property (nonatomic, strong) NSString * ROUTE; 
@property (nonatomic, strong) NSString * ADDRESS; 
@property (nonatomic, strong) NSString * LATITUDE; 
@property (nonatomic, strong) NSString * LONGITUDE; 
@property (nonatomic, strong) NSString * HAZARD; 
@property (nonatomic, strong) NSString * RISK; 

// Methods 
- (id) initWithID: (NSString *) hazardsID andROUTE: (NSString *) hazardsROUTE andADDRESS: (NSString *) hazardsADDRESS andLATITUDE: (NSString *) hazardsLATITUDE andLONGITUDE: (NSString *) hazardsLONGITUDE andHAZARD: (NSString *) hazardsHAZARD andRISK: (NSString *) hazardsRISK; 

@end

hazards.m

#import "Hazards.h" 

@implementation Hazards 
@synthesize coordinate, title, subtitle, ID, ROUTE, ADDRESS, LATITUDE, LONGITUDE, HAZARD, RISK; 

- (id) initWithID: (NSString *) hazardsID andROUTE: (NSString *) hazardsROUTE andADDRESS: (NSString *) hazardsADDRESS andLATITUDE: (NSString *) hazardsLATITUDE andLONGITUDE: (NSString *) hazardsLONGITUDE andHAZARD: (NSString *) hazardsHAZARD andRISK: (NSString *) hazardsRISK { 

    self = [super init]; 
    if (self) 
    { 
     ID = hazardsID; 
     ROUTE = hazardsROUTE; 
     ADDRESS = hazardsADDRESS; 
     LATITUDE = hazardsLATITUDE; 
     LONGITUDE = hazardsLONGITUDE; 
     HAZARD = hazardsHAZARD; 
     RISK = hazardsRISK; 
    } 
return self; 
} 

@end

viewController.h

#import <UIKit/UIKit.h> 
#import <MapKit/MapKit.h> 
#import "Hazards.h" 

@interface ViewController : UIViewController 

@property (nonatomic, strong) NSMutableArray *json; 
@property (nonatomic, strong) NSMutableArray *hazardsArray; 

@property (weak, nonatomic) IBOutlet MKMapView *mapView; 

#pragma mark - Methods 
-(void) retrieveData; 

@end

viewController.m

#import "ViewController.h" 
#import "Hazards.h" 

@interface ViewController() 

@end 

// Railway Street Ballymena Coordinates 
#define BALLYMENA_LATITUDE 54.857719; 
#define BALLYMENA_LONGITUDE -6.280654; 

// Span 
#define THE_SPAN 0.01f; 

#define getDataURL @"localhost:8888/rmb/json.php" 

@implementation ViewController 
@synthesize json, hazardsArray, mapView; 

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Create the region 
    MKCoordinateRegion myRegion; 

    // Center 
    CLLocationCoordinate2D center; 
    center.latitude = BALLYMENA_LATITUDE; 
    center.longitude = BALLYMENA_LONGITUDE; 

    //Span 
    MKCoordinateSpan span; 
    span.latitudeDelta = THE_SPAN; 
    span.longitudeDelta = THE_SPAN; 

    myRegion.center = center; 
    myRegion.span = span; 

    // Set our mapview 
    [mapView setRegion:myRegion animated: YES]; 

    // Annotation 
    NSMutableArray *locations = [[NSMutableArray alloc] init]; 
    CLLocationCoordinate2D location; 
    Hazards *myAnn; 

    // Pin to show Royal Mail Ballymena delivery office 
    myAnn = [[Hazards alloc] init]; 
    location.latitude = BALLYMENA_LATITUDE; 
    location.longitude = BALLYMENA_LONGITUDE; 
    myAnn.coordinate = location; 
    myAnn.title = @"Royal Mail Ballymena"; 
    myAnn.subtitle = @"111, Railway Street"; 
    [locations addObject:myAnn]; 

    [self.mapView addAnnotations:locations]; 

    } 

- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

#pragma mark - Methods 
-(void) retrieveData { 
    NSURL *url = [NSURL URLWithString:getDataURL]; 
    NSData *data = [NSData dataWithContentsOfURL:url]; 

    json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:nil]; 

    // Setup our hazards array 
    hazardsArray = [[NSMutableArray alloc] init]; 

    for (int i =0; i < json.count; i++) { 

     // Create hazard object 
     NSString *hazardsID = [[json objectAtIndex:i] objectForKey:@"ID"]; 
     NSString *hazardsROUTE = [[json objectAtIndex:i] objectForKey:@"ROUTE"]; 
     NSString *hazardsADDRESS = [[json objectAtIndex:i] objectForKey:@"ADDRESS"]; 
     NSString *hazardsLATITUDE = [[json objectAtIndex:i] objectForKey:@"LATITUDE"]; 
     NSString *hazardsLONGITUDE = [[json objectAtIndex:i] objectForKey:@"LONGITUDE"]; 
     NSString *hazardsHAZARD = [[json objectAtIndex:i] objectForKey:@"HAZARD"]; 
     NSString *hazardsRISK = [[json objectAtIndex:i] objectForKey:@"RISK"]; 

     Hazards *myHazards = [[Hazards alloc] initWithID:hazardsID andROUTE:hazardsROUTE andADDRESS:hazardsADDRESS andLATITUDE:hazardsLATITUDE andLONGITUDE:hazardsLONGITUDE andHAZARD:hazardsHAZARD andRISK:hazardsRISK]; 

     // Add our hazards object to our hazards array 
     [hazardsArray addObject:myHazards]; 
    } 
    // [self.mapView addAnnotation:hazardsArray]; 
} 

@end

提前

来源

2013-04-22 Elfuthark

假设非常感谢您的retrieveData建立正确危害对象，被称为在正确的时间，你既可以用这条线添加它们一次一个循环

[self.mapView addAnnotation:myHazards];

或全部在里面一次循环完成后

[self.mapView addAnnotations:hazardsArray];

来源

2013-04-29 00:53:43 Craig

将NSMutable数组导入映射注释

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