Question

[__ NSCFDictionary objectAtIndex：]：无法识别的选择器发送到实例0x7b0bb4b0 2014-10-15 11：32：53.278阿拉伯人[635：26220] ***由于未捕获的异常'NSInvalidArgumentException'终止应用程序，原因：' - [__ NSCFDictionary objectAtIndex：]：无法识别的选择器发送到实例0x7b0bb4b0'

我在这里面对这个错误......请帮帮我

NSDictionary *dic=[self.homeDataDictionary objectForKey:@"co_home_business_interview"];
NSArray *firstArray = [dic objectForKey:@"co_home_business"];
NSArray *secondArray = [dic objectForKey:@"co_home_interview"];

TitleButtonLabel *titleLabel1 = [[TitleButtonLabel alloc] initWithFrame:CGRectMake(130, 490, 161, 21)];
titleLabel1.section = indexPath.section;
titleLabel1.row = 1;
[cell.contentView addSubview:titleLabel1];
NSString *titlestr=[Utility stringByStrippingHTML:[[firstArray objectAtIndex:0] objectForKey:@"title"]];
[titleLabel1 setTitle:titlestr forState:UIControlStateNormal];
titleLabel1.titleLabel.textAlignment = NSTextAlignmentRight;
titleLabel1.titleLabel.numberOfLines = 1;
titleLabel1.lineBreakMode = UILineBreakModeWordWrap | UILineBreakModeTailTruncation;
[titleLabel1 setTitleColor:[UIColor colorWithRed:221/255.0f green:0/255.0f blue:26/255.0f alpha:1.0f] forState:UIControlStateNormal];
[titleLabel1 setTitleColor:[UIColor colorWithRed:0/255.0f green:204/255.0f blue:0/255.0f alpha:1.0f] forState:UIControlStateHighlighted];
[titleLabel1 addTarget:self action:@selector(titleButtonAction:) forControlEvents:UIControlEventTouchUpInside];

Answer 1

您的一个变量firstArray或secondArray并不真正指向数组，而是指向字典。拨打objectAtIndex:

时，请确保手上有一个阵列

Answer 2

检查self.homeDataDictionary字典的数据结构。如果您发现其中有NSDictionaries，那该怎么办？您可能缺少一些括号()我的意思是NSArray，只有一个对象看起来像NSDictionary结构。再次验证从self.homeDataDictionary返回的对象是NSDictionary而不是NSArray。

在进一步操作之前，还要先NSLog检查返回对象类型。

NSArray *firstArray = [dic objectForKey:@"co_home_business"];
NSArray *secondArray = [dic objectForKey:@"co_home_interview"];

上面两行似乎有些错误。对象dic可能是NSArray。并检查其返回值并确保其为NSArray而不是NSDictionary

[__NSCFDictionary objectAtIndex：]：无法识别的选择器发送到实例0x79a05830

2 个答案: