UIPicker 视图和 UITable 视图

Question

我在 UIPickerview 和 UITableview 中都面临常见错误，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.'

请

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

帮助我解释为什么会出现这些错误。

我认为这是由于数据源以及表视图和选择器视图与文件所有者的委托连接所致。但我每件事都做对了。

请帮帮我。

谢谢。

Answer 1

@Aman：这里是代码：

@Aman：在

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

    NSMutableArray *CurrencyArray;
    IBOutlet UIPickerView *CurrencyPicker;
}

setting.m中的setting.h中

- (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

我认为这篇文章可能会有所帮助你