Question

我不能以任何方式引用它并获得运行的空白。我可以在任何其他类中运行void只是创建一个函数并调用它但在这个类中没有视图加载。所以Q是，我该如何运行呢？

我尝试引用其他类中的变量，但它会给编译器错误。

getCoords的返回值必须是double类型，因为它是坐标。

#import "OmarAnnotation.h"
#import <CommonCrypto/CommonHMAC.h>
#import <netdb.h>
#import "AppDelegate.h"
#import "MapViewController.h"



@implementation SFAnnotation

@synthesize image;
@synthesize latitude;
@synthesize longitude;
@synthesize string;




+(void) getCoords {
NSString *string = @"http://jerwuqu.info/iambored/?GETPOS";
NSURL *url = [NSURL URLWithString:string];
NSString *otherURLContents = [NSString stringWithContentsOfURL:url];
NSLog(otherURLContents);

NSArray* foo = [otherURLContents componentsSeparatedByString: @","];
NSString *longi = [foo objectAtIndex: 0];
NSString *lati = [foo objectAtIndex: 1];
NSLog(longi);
NSLog(lati);

double latiDouble = [lati doubleValue];
double longiDouble = [longi doubleValue];

}


- (CLLocationCoordinate2D)coordinate;
{
 double extern *latiDouble;
 double extern *longiDouble;


CLLocationCoordinate2D theCoordinate;
theCoordinate.latitude  = latiDouble;
theCoordinate.longitude = longiDouble;
return theCoordinate;

}


- (void)dealloc
{
[image release];
[super dealloc];
}

- (NSString *)title
{
return @"Omar";
}

// optional
- (NSString *)subtitle
{



return @"Ortdenhegen";

}


@end

//这是我在其他类文件中的viewDidLoad

    - (void)viewDidLoad
     {
     self.mapView.mapType = MKMapTypeStandard;   //Satelite?       
     self.mapAnnotations = [[NSMutableArray alloc] initWithCapacity:2];
     SFAnnotation *sfAnnotation = [[SFAnnotation alloc] init];
     [self.mapAnnotations insertObject:sfAnnotation atIndex:0];
     [SFAnnotation getCoords]; // <- The line with an error
     [self cityAction:self];
     [self gotoLocation];
     }

Answer 1

在你正在打电话的其他课堂上，写下[sfAnnotation whateverMethodYouWantToCall];

例如，如果你想从另一个类的viewDidLoad中调用getCoords：

-(void)viewDidLoad{
    //Whatever code you have before.
    [sfAnnotation getCoords];
    //Whatever code you have after.
}

从另一个类启动时运行void

1 个答案: