为什么我收到字符串变量错误？

Question

我有声明的变量：

@property(strong, nonatomic) NSString* like_id;

我在- (void)viewDidLoad {}

中调用函数GetLike

- (void) GetLike {
   if(![self.like_id isEqualToString:@""]){
     // TODO
   }
}

我收到错误：Thread 1, signal SIGABRT

Answer 1

这对我来说很好。

@interface ViewController ()
@property(strong, nonatomic) NSString* like_id;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self getLike];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
}

- (void)getLike {
    if(![self.like_id isEqualToString:@""]){
        NSLog(@"Liked !");
    }
}
@end

为什么我收到字符串变量错误？

Why I get error for string variable?

objective-c

sigabrt

ios