UIPicker 视图和 UITable 视图

Question

我在 UIPickerview 和 UITableview 中都面临着常见错误，即

Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIViewController 0x4d32080> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key CurrencyPicker.'

和

Terminating app due to uncaught exception 'NSUnknownKeyException', reason: '[<UIViewController 0x4b2c070> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key tableView.'

请帮我解释为什么会这样。

我认为这是由于表视图和选择器视图与文件所有者的数据源和委托连接。 但我做的每一件事都是正确的。

请帮帮我。

谢谢。

Answer 1

@Aman：这是代码：

@阿曼：在setting.h

@interface Setting : UIViewController <UIPickerViewDelegate, UIPickerViewDataSource>{
    UIButton *button;

    NSMutableArray *CurrencyArray;
    IBOutlet UIPickerView *CurrencyPicker;
}

在设置.m

- (void)viewDidLoad {
    [super viewDidLoad];

    CurrencyArray = [[NSMutableArray alloc] init];
    [CurrencyArray addObject:@" Rs "];
    [CurrencyArray addObject:@" R$ "];
    [CurrencyArray addObject:@" $ "];
    [CurrencyArray addObject:@" ƒ "];
    [CurrencyArray addObject:@" ман "];

    button=(UIButton *)[self.view viewWithTag:1];

    [CurrencyPicker selectRow:1 inComponent:0 animated:NO];
    [button setTitle:[CurrencyArray objectAtIndex:[CurrencyPicker selectedRowInComponent:0]] forState:UIControlStateNormal];
}
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView;
{
    return 1;
}

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
    [button setTitle:[CurrencyArray objectAtIndex:row] forState:UIControlStateNormal];
}

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component;
{
    return [CurrencyArray count];
}

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component;
{
    return [CurrencyArray objectAtIndex:row];
}

Answer 2

我认为这篇文章可以帮助你