objective-c - UIPickerView のコンポーネントの幅は手動で調整されますか?

Question

UIPickerView を作成し、viewcontroller'view に追加しました。

pickerview の幅を手動で調整しました。

写真を見ると、コンポーネントの中身の幅とコンポーネントの幅が一致しておらず、

pickerview の幅とコンポーネントの幅。

UILabel の sizeToFit のようなメソッドはありますか?

expected code is :
    - (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component {
        switch(component) {
            [pickerView.label sizeToFit];
        }
    }


================= Following is mycode ====================================================
- (void)viewDidLoad {

    self.view.backgroundColor = [UIColor scrollViewTexturedBackgroundColor];

    [super viewDidLoad];

    UIPickerView *pickerView = [[[UIPickerView alloc] initWithFrame:CGRectMake(0, 0, 200, 200)] autorelease];
    pickerView.dataSource = self;
    pickerView.delegate = self;
    pickerView.showsSelectionIndicator = YES;

    [self.view addSubview:pickerView];


    activities = [[NSArray alloc] initWithObjects:@"sleeping", @"eating", @"working", @"studying", @"walking", @"thinking", @"considering", @"testing", @"talking", nil];
    feelings = [[NSArray alloc] initWithObjects:@"awesome", @"sad", @"happy", nil];

}

- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component {
    switch(component) {
        case 0: return 100;
        case 1: return 200;
    }
}