ios - segmented controller for annotations -
i need show 20 annotations around city center of amsterdam. want annotations separated in 3 kinds of subject. want control these subject annotations segmented controller. example: in segment 1 need show 'x' annotations. in segment 2 need show 'x' (other) annotations. same segment 3. each time press 1 of segments want remove others , show ones clicked.
this got far:
viewcontroller:
#import "viewcontroller.h" #import "annotations.h" @interface viewcontroller () @end @implementation viewcontroller @synthesize mymapview; - (void)viewdidload { [super viewdidload]; //create region mkcoordinateregion myregion; //center cllocationcoordinate2d center; center.latitude = 52.369331; center.longitude = 4.893467; //span mkcoordinatespan span; span.latitudedelta = 0.04f; span.longitudedelta = 0.04f; myregion.center = center; myregion.span = span; [mymapview setregion:myregion animated:yes]; //annotation nsmutablearray *locations = [[nsmutablearray alloc]init]; cllocationcoordinate2d location; annotations *myann; myann = [[annotations alloc]init]; location.latitude = 52.369331; location.longitude = 4.893467; myann.coordinate = location; myann.title = @"nes"; myann.subtitle = @"nes"; [locations addobject:myann]; myann = [[annotations alloc]init]; location.latitude = 52.379680; location.longitude = 4.886858; myann.coordinate = location; myann.title = @"noordermarkt"; myann.subtitle = @"noordermarkt"; [locations addobject:myann]; myann = [[annotations alloc]init]; location.latitude = 52.371532; location.longitude = 4.898080; myann.coordinate = location; myann.title = @"de wallen"; myann.subtitle = @"de wallen"; [locations addobject:myann]; [self.mymapview addannotations:locations]; } -(ibaction)setmap:(id)sender { switch (((uisegmentedcontrol *) sender).selectedsegmentindex ) { case 0: //for example: //show here annotation of nes break; case 1: //for example: //show here annotation of noordermarkt break; case 2: //for example: //show here annotation of de wallen break; default: break; } } @end annotations.h:
#import <foundation/foundation.h> #import <mapkit/mapkit.h> @interface annotations : nsobject <mkannotation> @property (nonatomic, assign) cllocationcoordinate2d coordinate; @property (nonatomic, copy) nsstring *title; @property (nonatomic, copy) nsstring *subtitle; @end update 2: viewcontroller.h
#import <uikit/uikit.h> #import <mapkit/mapkit.h> @interface viewcontroller : uiviewcontroller @property (nonatomic, weak) iboutlet mkmapview *mymapview; @property (retain, nonatomic) nsmutablearray *locationarrays; @property int currentannotation; -(ibaction)setmap:(id)sender; @end viewcontroller.m
#import "viewcontroller.h" #import "annotations.h" @interface viewcontroller () @end @implementation viewcontroller @synthesize mymapview; - (void)viewdidload { [super viewdidload]; //create region mkcoordinateregion myregion; //center cllocationcoordinate2d center; center.latitude = 52.369331; center.longitude = 4.893467; //span mkcoordinatespan span; span.latitudedelta = 0.04f; span.longitudedelta = 0.04f; myregion.center = center; myregion.span = span; [mymapview setregion:myregion animated:yes]; //annotation nsmutablearray *locations = [[nsmutablearray alloc]init]; cllocationcoordinate2d location; annotations *myann; nsmutablearray *category1 = [[nsmutablearray alloc]init]; nsmutablearray *category2 = [[nsmutablearray alloc]init]; nsmutablearray *category3 = [[nsmutablearray alloc]init]; nsmutablearray *locationarrays = [[nsmutablearray alloc]init]; myann = [[annotations alloc]init]; location.latitude = 52.369331; location.longitude = 4.893467; myann.coordinate = location; myann.title = @"nes"; myann.subtitle = @"nes"; [category1 addobject:myann]; //todo create , add other 'category 1' locations in same way [self.locationarrays addobject:category1]; myann = [[annotations alloc]init]; location.latitude = 52.379680; location.longitude = 4.886858; myann.coordinate = location; myann.title = @"noordermarkt"; myann.subtitle = @"noordermarkt"; [category2 addobject:myann]; //todo create , add other 'category 2' locations in same way [self.locationarrays addobject:category2]; myann = [[annotations alloc]init]; location.latitude = 52.371532; location.longitude = 4.898080; myann.coordinate = location; myann.title = @"de wallen"; myann.subtitle = @"de wallen"; [category3 addobject:myann]; myann = [[annotations alloc]init]; location.latitude = 52.368585; location.longitude = 4.886457; myann.coordinate = location; myann.title = @"bijbels museum"; myann.subtitle = @"bijbels museum"; [category3 addobject:myann]; //todo create , add other 'category 3' locations in same way [self.locationarrays addobject:category3]; self.currentannotation = 0; [self.mymapview addannotations:[locationarrays objectatindex:0]]; } - (void)didreceivememorywarning { [self setmymapview:nil]; [super didreceivememorywarning]; // dispose of resources can recreated. } -(ibaction)setmap:(id)sender { int newannotations=((uisegmentedcontrol *) sender).selectedsegmentindex; if (newannotations != self.currentannotation) { [self.mymapview removeannotations:[self.locationarrays objectatindex:self.currentannotation]]; [self.mymapview addannotations:[self.locationarrays objectatindex:newannotations]]; self.currentannotation = newannotations; } } @end
here solution uses 3 arrays hold categories of annotations , selects appropriate 1 based on segmented controller
viewcontroller.h @interface pwviewcontroller : uiviewcontroller @property (strong,nonatomic) iboutlet mkmapview *mymapview; @property (strong,nonatomic) iboutlet uisegmentedcontrol *mysegmentedcontrol; @property int currentannotation; @property (strong,nonatomic) nsmutablearray *locationarrays; -(ibaction)setmap:(id)sender; viewcontroller.m - (void)viewdidload { [super viewdidload]; // additional setup after loading view, typically nib. self.locationarrays=[[nsmutablearray alloc]init]; //create region mkcoordinateregion myregion; //center cllocationcoordinate2d center; center.latitude = 52.369331; center.longitude = 4.893467; //span mkcoordinatespan span; span.latitudedelta = 0.04f; span.longitudedelta = 0.04f; myregion.center = center; myregion.span = span; [self.mymapview setregion:myregion animated:yes]; //annotation cllocationcoordinate2d location; annotation *myann; nsmutablearray *category1 = [[nsmutablearray alloc]init]; nsmutablearray *category2 = [[nsmutablearray alloc]init]; nsmutablearray *category3 = [[nsmutablearray alloc]init]; myann = [[annotation alloc]init]; location.latitude = 52.369331; location.longitude = 4.893467; myann.coordinate = location; myann.title = @"nes"; myann.subtitle = @"nes"; [category1 addobject:myann]; //todo create , add other 'category 1' locations in same way [self.locationarrays addobject:category1]; myann = [[annotation alloc]init]; location.latitude = 52.379680; location.longitude = 4.886858; myann.coordinate = location; myann.title = @"noordermarkt"; myann.subtitle = @"noordermarkt"; [category2 addobject:myann]; //todo create , add other 'category 2' locations in same way [self.locationarrays addobject:category2]; myann = [[annotation alloc]init]; location.latitude = 52.371532; location.longitude = 4.898080; myann.coordinate = location; myann.title = @"de wallen"; myann.subtitle = @"de wallen"; [category3 addobject:myann]; myann = [[annotation alloc]init]; location.latitude = 52.368585; location.longitude = 4.886457; myann.coordinate = location; myann.title = @"bijbels museum"; myann.subtitle = @"bijbels museum"; [category3 addobject:myann]; //todo create , add other 'category 3' locations in same way [self.locationarrays addobject:category3]; self.currentannotation = 0; [self.mymapview addannotations:[self.locationarrays objectatindex:0]]; } -(ibaction)setmap:(id)sender { int newannotations=((uisegmentedcontrol *) sender).selectedsegmentindex; if (newannotations != self.currentannotation) { [self.mymapview removeannotations:[self.locationarrays objectatindex:self.currentannotation]]; [self.mymapview addannotations:[self.locationarrays objectatindex:newannotations]]; self.currentannotation = newannotations; } }
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