ios：mapkit如何在地圖上啓用curent位置按鈕？

Question

我正在開發顯示地圖的應用程序。我在地圖屬性中啓用了用戶當前位置，並且它現在顯示藍色點，表示用戶的當前位置，但現在我想啓用下圖左下角的按鈕（iPhone中地圖應用程序的快照）。

請告訴我，我怎麼得到這個在地圖上

Answer 1

在這裏，你可以找到這個

iOS6MapsUserHeadingButton

繼實現的代碼，你可以找到在上面給出鏈接的圖像

//User Heading Button states images 
UIImage *buttonImage = [UIImage imageNamed:@"greyButtonHighlight.png"]; 
UIImage *buttonImageHighlight = [UIImage imageNamed:@"greyButton.png"]; 
UIImage *buttonArrow = [UIImage imageNamed:@"LocationGrey.png"]; 

//Configure the button 
userHeadingBtn = [UIButton buttonWithType:UIButtonTypeCustom]; 
[userHeadingBtn addTarget:self action:@selector(startShowingUserHeading:) forControlEvents:UIControlEventTouchUpInside]; 
//Add state images 
[userHeadingBtn setBackgroundImage:buttonImage forState:UIControlStateNormal]; 
[userHeadingBtn setBackgroundImage:buttonImage forState:UIControlStateNormal]; 
[userHeadingBtn setBackgroundImage:buttonImageHighlight forState:UIControlStateHighlighted]; 
[userHeadingBtn setImage:buttonArrow forState:UIControlStateNormal]; 

//Button shadow 
userHeadingBtn.frame = CGRectMake(5,425,39,30); 
userHeadingBtn.layer.cornerRadius = 8.0f; 
userHeadingBtn.layer.masksToBounds = NO; 
userHeadingBtn.layer.shadowColor = [UIColor blackColor].CGColor; 
userHeadingBtn.layer.shadowOpacity = 0.8; 
userHeadingBtn.layer.shadowRadius = 1; 
userHeadingBtn.layer.shadowOffset = CGSizeMake(0, 1.0f); 

[self.mapView addSubview:userHeadingBtn]; 

Answer 2

MKUserTrackingBarButtonItem *trackButton = [[MKUserTrackingBarButtonItem alloc] initWithMapView:mapView]; 
[trackButton setTarget:self]; 
[trackButton setAction:@selector(track:)]; 

[toolbar setItems:[NSArray arrayWithObjects:trackButton, nil] animated:YES]; 

Answer 3

您需要創建MKUserTrackingBarButtonItem並把它傳遞到的MKMapView無論你定義的MapView。類似下面：

- (void)viewDidLoad 
{ 
    [super viewDidLoad];  
    MKUserTrackingBarButtonItem *buttonItem = [[MKUserTrackingBarButtonItem alloc] initWithMapView:self.map]; 
    self.navigationItem.rightBarButtonItem = buttonItem; 
}