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如何修复这样的错误：无法识别的选择器发送到实例？

CLLocationCoordinate2D userCoordinate = userLocation.location.coordinate;
CGFloat latDelta = rand()*.035/RAND_MAX -.02;
CGFloat longDelta = rand()*.03/RAND_MAX -.015;
CLLocationCoordinate2D newCoord = { userCoordinate.latitude + latDelta, userCoordinate.longitude + longDelta };
myPoint *mp = [[myPoint alloc] initWithCoordinate:newCoord title:[NSString stringWithFormat:@"Vitaliy Home %d",i] subTitle:@"Home Sweet Home"];
[mv addAnnotation:mp]; //mv - (MKMapView *)mv

错误在线：

myPoint *mp = [[myPoint alloc] initWithCoordinate:newCoord title:[NSString stringWithFormat:@"Vitaliy Home %d",i] subTitle:@"Home Sweet Home"];

类我点：

@interface myPoint : NSObject<MKAnnotation> {
    NSString *title;
    NSString *subTitle;
    CLLocationCoordinate2D coordinate;
}

@property (nonatomic,readonly) CLLocationCoordinate2D coordinate;
@property (nonatomic,copy) NSString *title;
@property (nonatomic,copy) NSString *subTitle;

- (id)initWithCoordinate:(CLLocationCoordinate2D) c title:(NSString *) t subTitle:(NSString *) st;

@end

谢谢你。

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2 回答 2

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您可能在initWithCoordinate:...方法中执行以下操作：

self.coordinate = c;

这不是一个简单的分配，这是调用一个setCoordinate:不存在的方法（属性设置器），它以异常结束。

修复编译器警告！

于 2013-05-30T18:59:13.907 回答
0

问题在于该方法的实施不正确，感谢@BrunoKoga。

于 2013-05-30T18:59:53.690 回答