ios：mapkit如何在地圖上啟用curent location按鈕？

Question

我正在開發顯示地圖的應用程序。 我在地圖屬性中啟用了用戶當前位置，現在顯示藍點表示用戶的當前位置，但現在我想在Pic下方的左下角啟用按鈕（iPhone中地圖應用程序的快照）。

請告訴我如何在地圖上獲取此信息

Answer 1

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

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

Answer 2

在這里你可以找到這個的實現

iOS6MapsUserHeadingButton

以下是代碼，您可以在上面給出的鏈接中找到圖像

//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 3

您需要創建MKUserTrackingBarButtonItem並將其傳遞到MKMapview，無論您在何處定義mapview。 如下所示：

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