在目标c中使用jsonModel映射时，将默认值设置为null字段

Question

I have a model which is the response of server. one of its properties is set to null from server. How can I set it to empty string when receiving null?

Model:

@interface infoResponseEntity : JSONModel

@property (retain, nullable) NSString *date;
@property (retain, nonatomic) NSString *time;
@property (retain, nullable) NSString *description;

@end

Answer 1

For more convenient you can write an extender for NSString. This is .h file

@interface NSString (Extender)

+ (BOOL)isNull:(NSString *)string;

@end

and this is .m file

@implementation NSString (Extender)


+ (BOOL)isNull:(NSString *)string;
{
    return (string == nil);
}

@end

Finally, you can use the above method for check value of property in your model. For example:

if ([NSString isNull:self.date]) {

  self.date = @""; 

}