MapKit中的MapTypeStyle

Question

我想知道是否有任何方法配置我們的MapKit地圖，就像我們在Google Maps API中使用MapTypeStyle對象一樣。

如果我指的是蘋果文檔的查看，的MKMapView有需要MKMapType constant但沒有風格的參數，如MapOptions用於與MapTypeStyle和MapTypeStyler至極是快速的地圖定製非常強大的一個地圖類型選項。

所以我的問題是：有沒有什麼辦法可以實現與MapKit框架類似的東西，如果沒有，最好的框架/庫是做什麼的？我正在考慮MapBox及類似產品。

Answer 1

有幾個選擇給你我的朋友。你可以使用這些框架

http://cloudmade.com/products/iphone-sdk

https://github.com/route-me/route-me

的一個或者你可以只使用mapbox。他們的api看起來不錯。 或者，您可以提供自己的地圖圖塊和覆蓋圖mapkit。像這樣的事情在MKOverlayView

- (void)drawMapRect:(MKMapRect)mapRect zoomScale:(MKZoomScale)zoomScale inContext:(CGContextRef)context { 

NSURL* fileURL = [(HeatMap*)self.overlay localUrlForStyle:@"alien" withMapRect:mapRect andZoomScale:zoomScale]; 
NSData *imageData = [NSData dataWithContentsOfURL:fileURL ]; 
if (imageData != nil) { 
    UIImage* img = [UIImage imageNamed:@"aTileX.png"]; 
    // Perform the image render on the current UI context 
    UIGraphicsPushContext(context); 
    [img drawInRect:[self rectForMapRect:mapRect] blendMode:kCGBlendModeNormal alpha:1.0]; 
    UIGraphicsPopContext(); 
    } 
} 

，如果你想不支持的「地形」也看看這個模式 http://openradar.appspot.com/9621632

我實際上是在需要在地圖上覆蓋瓦片程序的中間。 This example一直很有幫助。你會想看看MKOverlay和MKOverlayView。我正在做的項目涉及使用gheat。我通過NSURLConnection訪問磁貼並將它們存儲在本地。 A gist我的實施。

Answer 2

沒有辦法用mapkit自然地定製地圖樣式。您唯一的選擇是選擇混合應用程序方法，然後在頁面中使用html/javascript自定義樣式。

Answer 3

由於在一個名爲MKMapTileView的私人課程中繪製圖塊，您不能簡單地編寫一個類別。您必須爲自定義繪圖實現另一個類。這個類的方法將被用來在運行時過載MKMapTileView實現：

頭文件

@interface MyColorMap : NSObject 
+ (void)overLoadMethods:(Class)destinationClass; 
@end 

Imlementation：

#import "MyColorMap.h" 
#import <objc/runtime.h> 

@implementation MyColorMap 

+ (void)overLoadMethods:(Class)destinationClass { 
    // get the original method for drawing a tile 
    Method originalDrawLayer = class_getInstanceMethod(destinationClass, @selector(drawLayer:inContext:)); 

    // get the method we will replace with the original implementation of 'drawLayer:inContext:' later 
    Method backupDrawLayer = class_getInstanceMethod([self class], @selector(backupDrawLayer:inContext:)); 

    // get the method we will use to draw our own colors 
    Method myDrawLayer = class_getInstanceMethod([self class], @selector(myDrawLayer:inContext:)); 

    // dito with the implementations 
    IMP impOld = method_getImplementation(originalDrawLayer); 
    IMP impNew = method_getImplementation(myDrawLayer); 

    // replace the original 'drawLayer:inContext:' with our own implementation 
    method_setImplementation(originalDrawLayer, impNew); 

    // set the original 'drawLayer:inContext:' implementation to our stub-method, so wie can call it later on 
    SEL selector = method_getName(backupDrawLayer); 
    const char *types = method_getTypeEncoding(backupDrawLayer); 
    class_addMethod(destinationClass, selector, impOld, types); 
} 


- (void)backupDrawLayer:(CALayer*)l inContext:(CGContextRef)c { 
    // stub method, implementation will never be called. The only reason we implement this is so we can call the original method durring runtime 
} 

- (void)myDrawLayer:(CALayer*)l inContext:(CGContextRef)c { 
    // set background to white so wie can use it for blendmode 
    CGContextSetFillColorWithColor(c, [[UIColor whiteColor] CGColor]); 
    CGContextFillRect(c, CGContextGetClipBoundingBox(c)); 

    // set blendmode so the map will show as grayscale 
    CGContextSetBlendMode(c, kCGBlendModeLuminosity); 
    // kCGBlendModeExclusion for inverted colors etc. 

    // calling the stub-method which will become the original method durring runtime 
    [self backupDrawLayer:l inContext:c]; 

    // if you want more advanced manipulations you can alter the context after drawing: 

// int w = CGBitmapContextGetWidth(c); 
// int h = CGBitmapContextGetHeight(c); 
//  
// unsigned char* data = CGBitmapContextGetData(c); 
// if (data != NULL) { 
//  int maxY = h; 
//  for(int y = 0; y<maxY; y++) { 
//   for(int x = 0; x<w; x++) { 
//     
//    int offset = 4*((w*y)+x); 
//    char r = data[offset]; 
//    char g = data[offset+1]; 
//    char b = data[offset+2]; 
//    char a = data[offset+3]; 
//     
//    // do what ever you want with the pixels 
//     
//    data[offset] = r; 
//    data[offset+1] = g; 
//    data[offset+2] = b; 
//    data[offset+3] = a; 
//   } 
//  } 
// } 
} 

現在你必須之前調用[MyColorMap overLoadMethods:NSClassFromString(@"MKMapTileView")]在一些點使用MKMapView