正在终止应用程序，原因是未捕获的异常'NSInvalidArgumentException'，原因：'-[Obrat setSuma:]：无法识别的选择器已发送到实例0x64139d0‘

Question

您好，我如何解决或发送此错误的原因是什么？

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[Obrat setSuma:]: unrecognized selector sent to instance 0x64139d0'

这一行让我大吃一惊：

objectObrat.suma = [[NSString alloc] initWithString:string];

Obrat.h是：

#import <CoreData/CoreData.h>


@interface Obrat :  NSManagedObject  
{
}

@property (nonatomic, retain) NSString * cConstanatSymb;
@property (nonatomic, retain) NSString * constanatSymbol;
@property (nonatomic, retain) NSString * specSymbol;
@property (nonatomic, retain) NSString * currency;
@property (nonatomic, retain) NSString * balance;
@property (nonatomic, retain) NSString * message1;
@property (nonatomic, retain) NSString * type;
@property (nonatomic, retain) NSString * maturityDate;
@property (nonatomic, retain) NSNumber * id;
@property (nonatomic, retain) NSString * suma;
@property (nonatomic, retain) NSString * variableSymbol;
@property (nonatomic, retain) NSString * counterName;
@property (nonatomic, retain) NSString * storno;
@property (nonatomic, retain) NSString * message2;
@property (nonatomic, retain) NSString * note;
@property (nonatomic, retain) NSString * counterBank;
@property (nonatomic, retain) NSString * coounterAccount;
@property (nonatomic, retain) NSString * counterPrefix;
@property (nonatomic, retain) NSString * rate;
@property (nonatomic, retain) NSString * transactionDate;
@property (nonatomic, retain) NSDate * dateOfObrat;

@end

obrat.m是：

#import "Obrat.h"


@implementation Obrat 

@dynamic cConstanatSymb;
@dynamic constanatSymbol;
@dynamic specSymbol;
@dynamic currency;
@dynamic balance;
@dynamic message1;
@dynamic type;
@dynamic maturityDate;
@dynamic id;
@dynamic suma;
@dynamic variableSymbol;
@dynamic counterName;
@dynamic storno;
@dynamic message2;
@dynamic note;
@dynamic counterBank;
@dynamic coounterAccount;
@dynamic counterPrefix;
@dynamic rate;
@dynamic transactionDate;
@dynamic dateOfObrat;

@end

谢谢

Answer 1

使用@synthesize suma;而不是@dynamic suma;来指示编译器生成必要的getter和setter方法。请参阅http://cocoadevcentral.com/d/learn_objectivec/