Dictionary and Array value cannot be nil

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Dictionary and Array value cannot be nil

2018年08月06日 ⁄ 综合 ⁄ 共 979字 ⁄ 字号小中大 ⁄ 评论关闭

Dictionary value cannot be nil

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSPlaceholderDictionary initWithObjects:forKeys:count:]: attempt to insert nil object from objects[2]'

*** First throw call stack:

NSString *a;

  dic2 =
@{
             @"key":@"value",
              @"ko":@"",
             @"xue":a

};

Array element cannot be nil

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[__NSPlaceholderArray initWithObjects:count:]: attempt to insert nil object from objects[2]'

*** First throw call stack:

NSString *a;

array2 = @[@"",@"0",a];

测试：数组不能有nil的对象，字典不能插入nil的值

-(void)setData{

    NSDictionary *dic1;
    NSArray *array1;
    dic1 = @{};
    array1 = @[];
    NSLog(@"dic1:%@",dic1);
    NSLog(@"array1:%@",array1);

    NSDictionary *dic2;
    NSArray *array2;
    NSString *a;
//    a=nil;
    dic2 = @{
             @"key":@"value",
              @"ko":@"",
             @"xue":a
             };
    array2 = @[@"",@"0",a];
    NSLog(@"dic2:%@",dic2);
    NSLog(@"array2:%@",array2);

}