UIpicker數組更改值

Question

我正在製作一個應用程序，它使用選取器讓用戶選擇年齡和其他輸入。例如：我有一個按鈕年齡，當用戶點擊它時，選擇器會顯示年齡。我設法爲所有輸入添加單個選取器，但是如何在爲每個選取器設置不同陣列時遇到問題。

- (NSString *)pickerView:(UIPickerView *)thePickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component { 
    if (pickerview == picker) { 
     return [pickerViewArray objectAtIndex:row]; 
    } 
    else if (pickerview == stagepicker) 
     return [stagepickerarray objectAtInde:row]; 
    } 
} 

- (NSInteger)pickerView:(UIPickerView *)thePickerView numberOfRowsInComponent:(NSInteger)component { 
    if (thePickerView == picker){ return [pickerViewArray count]; } 
    else if (thePickerView == stagepicker){ [stagepickerarray count]; } 
} 

上述方法不適用於我！我做對了嗎？

Answer 1

- (NSString *)pickerView:(UIPickerView *)thePickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component { 
    if (pickerview == picker) { 

不聽起來像是pickerview應該寫thePickerView呢？

return [stagepickerarray objectAtInde:row]; 

不聽起來像是objectAtInde應該是objectAtIndex？

else if (thePickerView == stagepicker){ [stagepickerarray count]; } 

不聽起來像是一個return缺失的地方？

Answer 2

爲什麼不使用一個具有多個組件的UIPickerView？沿線的東西：

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component { 

NSInteger numberOfRows; 

if (component == 0) { 
    numberOfRows = [anArray count]; 
} 
else if(component == 1) { 
    numberOfRows = [anotherArray count]; 
} 
else { 
    numberOfRows = [aThirdArray count]; 
} 

return numberOfRows; 

} 

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component { 

NSString *stringIndex = [NSString stringWithFormat:@"TEST"]; 
if(component == 0) { 

    return stringIndex = [anArray objectAtIndex:row]; 
} 

else if(component == 1) { 
    return stringIndex = [anotherArray objectAtIndex:row]; 
} 

else { 
    return stringIndex = [aThirdArray objectAtIndex:row]; 
} 

return stringIndex; 

}