objective-c - 读取 plist 文件崩溃

Question

读入确实加载：

 NSFileManager *fileManager = [NSFileManager defaultManager];

if (![fileManager fileExistsAtPath: path]) //4
{
    NSString *bundle = [[NSBundle mainBundle] pathForResource:@"data" ofType:@"plist"]; //5

    [fileManager copyItemAtPath:bundle toPath: path error:&error]; //6
}

//load in text fields.
NSMutableDictionary *savedData = [[NSMutableDictionary alloc] initWithContentsOfFile: path];

nameField.text = [[savedData objectForKey:@"name"] stringValue];
locationTextField.text = [[savedData objectForKey:@"location"] stringValue];
sectorTextField.text = [[savedData objectForKey:@"sector"] stringValue];

写在按钮点击：

    - (IBAction)writingButton:(id)sender
{
    NSMutableDictionary *data = [[NSMutableDictionary alloc] initWithContentsOfFile: path];

    //[data setObject:[NSNumber numberWithInt:value] forKey:@"value"];
    [data setObject:[NSString stringWithString:nameField.text] forKey:@"name"];
    [data setObject:[NSString stringWithString:locationTextField.text] forKey:@"location"];
    [data setObject:[NSString stringWithString:sectorTextField.text] forKey:@"sector"];
}

plist文件：

错误：

2012-09-04 17:03:40.360 app[4849:c07] -[__NSCFString stringValue]: 无法识别的选择器发送到实例 0x6aa38f0 2012-09-04 17:03:40.362 app[4849:c07] *** 终止应用程序到期未捕获的异常 'NSInvalidArgumentException'，原因：'-[__NSCFString stringValue]: unrecognized selector sent to instance 0x6aa38f0'

有任何想法吗？干杯。

Answer 1

字典直接存储 NSString 对象 - 无需调用（不存在的）方法称为- stringValue. 简单地写

nameField.text = [savedData objectForKey:@"name"];

等等。

（为什么你认为这个方法调用是必要的？）