自定义函数中UI字段的未声明标识符

Question

我使用从我的.m文件中的按钮单击事件复制的代码创建了如下所示的自定义函数。代码工作正常，直到我将它复制到我的displayDev函数。这段代码中的最后三行给了我一个“使用未声明的标识符”的错误。有人可以帮我弄清楚为什么fullVerseLabel.text，VerseField.text和InterpretationField.text都显示为未声明的标识符？下面是我的.h代码，我声明了这些UI字段。

任何帮助，您可以提供将不胜感激。非常感谢！

void displayDev (NSInteger dayNum) 
{ NSString *plistFile = [[NSBundle mainBundle] pathForResource:@"Property List" ofType:@"plist"]; 
    NSDictionary *dict = [NSDictionary dictionaryWithContentsOfFile:plistFile]; 

    NSString *bookString = [[dict objectForKey:[NSString stringWithFormat:@"Day %d", dayNum]] objectForKey:@"Book"]; 
    NSString *chapterString = [[dict objectForKey:[NSString stringWithFormat:@"Day %d", dayNum]] objectForKey:@"Chapter#"]; 
    NSString *verseString = [[dict objectForKey:[NSString stringWithFormat:@"Day %d", dayNum]] objectForKey:@"Verse#"]; 

    NSString *fullVerseString = [bookString stringByAppendingString:@" "]; 
    fullVerseString = [fullVerseString stringByAppendingString:chapterString]; 
    fullVerseString = [fullVerseString stringByAppendingString:@":"]; 
    fullVerseString = [fullVerseString stringByAppendingString:verseString]; 
    fullVerseLabel.text = fullVerseString; 
    VerseField.text = [dict objectForKey:[NSString stringWithFormat:@"Day %d", dayNum]objectForKey:@"Verse"]; 
    InterpretationField.text = [dict objectForKey:[NSString stringWithFormat:@"Day %d", dayNum] objectForKey:@"Interpretation"]; 

    currentlyViewing = dayNum; 
} 

我有我的.h文件中声明的变量，并链接到我的故事板。随着该语法，你实际上宣告这是一个C函数，而不是Objective-C的

void displayDev (NSInteger dayNum) 

：

@interface FirstViewController : UIViewController 
{ IBOutlet UILabel *fullVerseLabel; 
    IBOutlet UITextView *VerseField; 
    IBOutlet UITextView *InterpretationField; 
    IBOutlet UITextField *TextField; 
} 

Answer 1

你开始这个方法用。您无法在C函数中访问您的插座或其他实例变量。您可以将其更改为Objective-C实例方法，方法是将第一行更改为：

- (void)displayDev:(NSInteger)dayNum