属性标题复制属性与从MKAnnotation继承的属性不匹配

Question

这些是调用警告的行:@property(nonatomic,retain)NSString*Title; @property(nonatomic,retain)NSString*Subtitle;

我的警告是:属性'title''copy'属性与从'MKAnnotation'继承的属性不匹配

有任何想法吗？

提前致谢!

#import <Foundation/Foundation.h>
#import <MapKit/MapKit.h>



@interface MapAnnotation : NSObject <MKAnnotation> {
    CLLocationCoordinate2D coordinate;
    NSString *title;
    NSString *subtitle;
    int listIndex;
}

@property (nonatomic) CLLocationCoordinate2D coordinate;
@property (nonatomic, retain) NSString *Title; 
@property (nonatomic, retain) NSString *Subtitle; 
@property (nonatomic) int listIndex;

@end

Answer 1

更改:

@property(nonatomic,retain)NSString*Title;

成:

@property(非原子,复制)NSString*title;