iOS MapKit导航及地理转码辅助类

头文件：

#import <Foundation/Foundation.h>
#import <MapKit/MapKit.h>@interface DirectionRouteUtils : NSObject
{
MKDirections *mDirections;
CLGeocoder *mGeocoder;
}+ (instancetype)sharedInstance;// 获取导航路线
- (void)findDirectionsFrom:(MKMapItem *)source
to:(MKMapItem *)destination
handler:(MKDirectionsHandler)completionHandler;- (void)findDirectionsFrom:(MKMapItem *)source
to:(MKMapItem *)destination
transportType:(MKDirectionsTransportType)transportType
handler:(MKDirectionsHandler)completionHandler;- (void)cancelCalculateDirections;// 地理转码- (void)cancelGeocode;
- (void)geocodeAddressString:(NSString *)addressString
completionHandler:(CLGeocodeCompletionHandler)completionHandler;- (void)reverseGeocodeLocation:(CLLocation *)location
completionHandler:(CLGeocodeCompletionHandler)completionHandler;@end

实现文件：

#import "DirectionRouteUtils.h"@implementation DirectionRouteUtils+ (instancetype)sharedInstance
{
static DirectionRouteUtils *sharedInstance = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
sharedInstance = [[[self class] alloc] init];
}); return sharedInstance;
}- (id)init
{
if (self = [super init]) {
mGeocoder = [[CLGeocoder alloc] init];
}
return self;
}- (void)findDirectionsFrom:(MKMapItem *)source
to:(MKMapItem *)destination
transportType:(MKDirectionsTransportType)transportType
handler:(MKDirectionsHandler)completionHandler
{
NSAssert(completionHandler != nil, @"Calculating directions handler shouldn't be nil!"); [self cancelCalculateDirections]; MKDirectionsRequest *request = [[MKDirectionsRequest alloc] init];
request.source = source;
request.destination = destination;
request.requestsAlternateRoutes = YES;
request.transportType = transportType; //MKDirectionsTransportTypeAutomobile;//MKDirectionsTransportTypeWalking; mDirections = [[MKDirections alloc] initWithRequest:request];
[request release]; /*
[directions calculateDirectionsWithCompletionHandler:
^(MKDirectionsResponse *response, NSError *error) { if (error) { NSLog(@"error:%@", error);
}
else {
NSLog(@"%@", response.routes);
MKRoute *route = response.routes[0]; for(MKRoute *step in route.steps)
{
NSLog(@"Step: %@", ((MKRouteStep *)step).instructions);
} [self.mapView addOverlay:route.polyline];
}
}];
*/ if(completionHandler){
[mDirections calculateDirectionsWithCompletionHandler:completionHandler];
}}- (void)findDirectionsFrom:(MKMapItem *)source
to:(MKMapItem *)destination
handler:(MKDirectionsHandler)completionHandler
{
[self findDirectionsFrom:source
to:destination
transportType:MKDirectionsTransportTypeAutomobile
handler:completionHandler];
}- (void)cancelCalculateDirections
{
if(mDirections){
[mDirections cancel];
[mDirections release];
mDirections = nil;
}
}- (void)cancelGeocode
{
[mGeocoder cancelGeocode];
}- (void)geocodeAddressString:(NSString *)addressString
completionHandler:(CLGeocodeCompletionHandler)completionHandler
{
NSAssert(completionHandler != nil, @"Geocoding handler shouldn't be nil!"); [self cancelGeocode];
[mGeocoder geocodeAddressString:addressString
completionHandler:completionHandler];
}- (void)reverseGeocodeLocation:(CLLocation *)location
completionHandler:(CLGeocodeCompletionHandler)completionHandler
{
NSAssert(completionHandler != nil, @"Reversegeocoding handler shouldn't be nil!"); [self cancelGeocode];
[mGeocoder reverseGeocodeLocation:location
completionHandler:completionHandler];}@end

測试用例：

- (void)testGeocoding
{
DirectionRouteUtils *utils = [DirectionRouteUtils sharedInstance];
[utils geocodeAddressString:@"你要測试的地址" completionHandler:^(NSArray *placemarks, NSError *error) {
for(CLPlacemark *mark in placemarks){
NSLog(@"%@", mark.addressDictionary);
}
}];}- (void)testReverseGeocoding
{
DirectionRouteUtils *utils = [DirectionRouteUtils sharedInstance];
CLLocation *location = [[CLLocation alloc] initWithLatitude:24.6182746 longitude:118.131588]; [utils reverseGeocodeLocation:location completionHandler:^(NSArray *placemarks, NSError *error) { for(CLPlacemark *mark in placemarks){
NSLog(@"%@", mark.addressDictionary);
NSLog(@"%@", mark);
} }];
[location release];
}- (void)testDirections
{ CLLocationCoordinate2D fromCoordinate = CLLocationCoordinate2DMake(24.6382086,
118.131588);
CLLocationCoordinate2D toCoordinate = CLLocationCoordinate2DMake(24.6182746,
118.131588); MKPlacemark *fromPlacemark = [[MKPlacemark alloc] initWithCoordinate:fromCoordinate
addressDictionary:nil]; MKPlacemark *toPlacemark = [[MKPlacemark alloc] initWithCoordinate:toCoordinate
addressDictionary:nil]; MKMapItem *fromItem = [[MKMapItem alloc] initWithPlacemark:fromPlacemark];
MKMapItem *toItem = [[MKMapItem alloc] initWithPlacemark:toPlacemark]; DirectionRouteUtils *utils = [DirectionRouteUtils sharedInstance];
[utils findDirectionsFrom:fromItem to:toItem handler:^(MKDirectionsResponse *response, NSError *error) {
if (error) { NSLog(@"error:%@", error);
}
else {
NSLog(@"%@", response.routes);
MKRoute *route = response.routes[0]; for(MKRoute *step in route.steps)
{
NSLog(@"Step: %@", ((MKRouteStep *)step).instructions);
} } }];
}