如何在NSDictionary下加載plist並傳遞字符串Array polygons？

Question

我正試圖加載data.plist字符串數組多邊形下的NSDictionary（例如+ 40.48675，-60.434543）建設。我有6個索引。我不斷收到警告「通過initWithID的參數7：name：code：number：location：description：polygons from incompatible pointer type。」 也繪製多邊形不顯示在地圖上。我錯過了什麼？

NSString *path = [[NSBundle mainBundle] pathForResource:@"data" ofType:@"plist"]; 
NSArray *array = [[[NSArray alloc] initWithContentsOfFile:path] objectAtIndex:0]; 

buildings = [[NSMutableArray alloc] init]; 

for(int i = 0; i < [array count]; i++) 
{ 
    NSMutableDictionary *dic = [array objectAtIndex:i]; 
    NSString *buildingID = [dic objectForKey:@"buildingID"]; 
    NSString *name = [dic objectForKey:@"name"]; 
    NSString *code = [dic objectForKey:@"code"]; 
    NSString *number = [dic objectForKey:@"number"]; 
    //NSString *location = [dic objectForKey:@"location"]; 
    NSString *description = [dic objectForKey:@"description"]; 
    //NSArray *components = [location componentsSeparatedByString:@","]; 
    //NSString *latitude = [components objectAtIndex:0]; 
    //NSString *longitude = [components objectAtIndex:1]; 

    NSArray *polygons = [[NSArray alloc] init]; 
    polygons = [dic objectForKey:@"polygons"]; 

    int countPoints = [self.polygons count]; 

    CLLocationCoordinate2D buildingPoly[countPoints]; 

    for (int i = 0; i < countPoints; i++) { 
     NSArray *splitArrayPoly = [[polygons objectAtIndex:i] componentsSeparatedByString:@","]; 
     buildingPoly[i] = CLLocationCoordinate2DMake([[splitArrayPoly objectAtIndex:0] floatValue], [[splitArrayPoly objectAtIndex:1] floatValue]); 
    }  


    NSArray *splitArray = [ [dic objectForKey:@"location"] componentsSeparatedByString:@","]; 
    float latitude = [[splitArray objectAtIndex:0]floatValue]; 
    float longitude = [[splitArray objectAtIndex:1]floatValue]; 

    CLLocation *tempLocation = [[[CLLocation alloc] 
           initWithLatitude:latitude 
           longitude:longitude]autorelease]; 

    Building *building = [[[Building alloc] initWithID:[buildingID intValue] 
                name:name 
                code:code 
               number:number 
               location:tempLocation 
              description:description 
               polygons:buildingPoly]autorelease]; //This is where I got warning 
    //building.polygons = polygons; // delete this when ure done with init 
    //NSLog(@"building.polygons = %@", building.polygons); // ask teacher about this 
    [buildings addObject:building]; 

    [dic release]; 
    [building release]; 

} 

然後在不同的類「Building.m」它傳遞多邊形到這裏

- (id)initWithID:(int)b_id 
      name:(NSString *)b_name 
      code:(NSString *)b_code 
      number:(NSString *)b_number 
     location:(CLLocation *)b_location 
    description:(NSString *)b_description 
     polygons:(NSArray *)b_polygons 
{ 
    self = [super init]; 
    if (self != nil) { 
     self.buildingID = b_id; 
     self.name = b_name; 
     self.location = b_location; 
     self.code = b_code; 
     self.number = b_number; 
     self.description = b_description; 
     self.polygons = b_polygons; 
    } 

    return self; 
} 

那麼這個方法應該得到所有多邊形，並使其在地圖上。但它沒有顯示任何東西。

- (MKPolygon *)getPolygons{ 

    int countPoints = [self.polygons count]; 

    CLLocationCoordinate2D building[countPoints]; 

    for (int i = 0; i < countPoints; i++) { 
     NSArray *splitArray = [[polygons objectAtIndex:i] componentsSeparatedByString:@","]; 
     building[i] = CLLocationCoordinate2DMake([[splitArray objectAtIndex:0] floatValue], [[splitArray objectAtIndex:1] floatValue]); 
    } 

    return [MKPolygon polygonWithCoordinates:building count:countPoints]; 

} 

Answer 1

根據自己定義的7參數initWithID應該是一個NSArray *

- (id)initWithID:(int)b_id 
     name:(NSString *)b_name 
     code:(NSString *)b_code 
     number:(NSString *)b_number 
    location:(CLLocation *)b_location 
description:(NSString *)b_description 
    polygons:(NSArray *)b_polygons; 

...但是當你把它傳遞buildingPoly ...

Building *building = [[[Building alloc] initWithID:[buildingID intValue] 
               name:name 
               code:code 
              number:number 
              location:tempLocation 
             description:description 
              polygons:buildingPoly]autorelease]; 

...和buildingPoly是...

CLLocationCoordinate2D buildingPoly[countPoints]; 

這不是一個NSArray。

你應該真的注意警告。他們經常直接告訴你問題所在。