UIPickerView不返回正確的數據

我有一個橫向視圖和一個肖像視圖，作爲包裝視圖的子視圖加載主視圖。橫向視圖和縱向視圖都具有鏈接到它們的UIPickerView對象。在我的源文件中，我將它們全部作爲屬性，並且還爲景觀和肖像拾取器提供了包裝。他們被定義爲UIPickerView不返回正確的數據

@property (nonatomic, retain, readonly) IBOutlet UIPickerView *pickerTown; 
@property (nonatomic, retain, readonly) IBOutlet UIPickerView *pickerType; 
@property (nonatomic, retain, readonly) IBOutlet UIDatePicker *pickerFrom; 
@property (nonatomic, retain, readonly) IBOutlet UIDatePicker *pickerTo; 

@property (nonatomic, retain) IBOutlet UIPickerView *landscapePickerTown; 
@property (nonatomic, retain) IBOutlet UIPickerView *landscapePickerType; 
@property (nonatomic, retain) IBOutlet UIDatePicker *landscapePickerFrom; 
@property (nonatomic, retain) IBOutlet UIDatePicker *landscapePickerTo; 

@property (nonatomic, retain) IBOutlet UIPickerView *portraitPickerTown; 
@property (nonatomic, retain) IBOutlet UIPickerView *portraitPickerType; 
@property (nonatomic, retain) IBOutlet UIDatePicker *portraitPickerFrom; 
@property (nonatomic, retain) IBOutlet UIDatePicker *portraitPickerTo;

和每個只讀包裝的我有

- (UIPickerView *) pickerTown 
{ 
    if(self.landscapeView.superview) 
    { 
     return landscapePickerTown; 
    }else 
    { 
     return portraitPickerTown; 
    } 
}

但是，當我在肖像或風景，我試着例如說

myHelper.selectedTown = [myHelper.towns objectAtIndex:[pickerTown selectedRowInComponent:0]];

我沒有得到選定的值，而只是數組中的第一個值。

的數據被添加如下：

if(pickerView == landscapePickerType || pickerView == portraitPickerType) { 
    return [myHelper.types objectAtIndex:row]; 
}else if(pickerView == landscapePickerTown || pickerView == portraitPickerTown){ 
    return [myHelper.towns objectAtIndex:row]; 
}else 
{ 
    return @""; 
}

和數組：

myHelper = [Helper sharedManager]; 
[myHelper.types addObject:@"None"]; 
[myHelper.types addObject:@"Food & Wine"]; 
[myHelper.types addObject:@"Test"]; 
[myHelper.towns addObject:@"None"]; 
[myHelper.towns addObject:@"Vanderbijlpark"]; 
[myHelper.towns addObject:@"Test"];

什麼我錯在這裏做什麼？

來源

2011-07-18 Armand

如果您只獲取第一個元素，則表明[pickerTown selectedRowInComponent:0]正在計算總是零，只有在pickerTown爲nil時纔會發生這種情況。這再次很可能是由於插座沒有連接。

但在這種情況下，我認爲你直接訪問實例變量，而不是方法返回的值。如果您使用@synthesize作爲pickerTown，請使用@dynamic。並將該語句更改爲[self.pickerTown selectedRowInComponent:0]以訪問getter的值。

來源

2011-07-18 08:23:43

作品謝謝 – Armand

UIPickerView不返回正確的數據

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