UIPickerView设置int变量

Question

- (BOOL)setupAVCapture
{
 NSError *error = nil;

frameDuration = CMTimeMakeWithSeconds(1./5., 90000);

AVCaptureSession *session = [AVCaptureSession new];
[session setSessionPreset:AVCaptureSessionPresetHigh];

这是我的Xcode项目的.m文件。有人可以告诉我，如果有一种方法来使用UIpickerView或任何方式，以便在运行应用程序时我可以将“5”更改为不同的数字，以便增加每秒帧数。拜托，我看了，在任何地方都没有答案。

---- UIPICKERVIEW CODE--

-(UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
{
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, pickerView.frame.size.width, 33)];
    label.backgroundColor = [UIColor clearColor];
    label.textColor = [UIColor whiteColor];
    label.font = [UIFont fontWithName:@"HelveticaNeue-bold" size:36];
    label.text = [NSString stringWithFormat:@"  %ld", row+1];
    return label;
}

-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
    return 1;
}

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

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

}

-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
    NSString *string = [NSString stringWithFormat:@"Fps:%@", [_list objectAtIndex:row]];
    _pickerLabel.text = string;
}

---

-(void)Viewdidload

 _list = [[NSMutableArray alloc] init];
    [_list addObject:@"  1"];
    [_list addObject:@"  2"];
    [_list addObject:@"  3"];
    [_list addObject:@"  4"];
    [_list addObject:@"  5"];
    [_list addObject:@"  6"];
    [_list addObject:@"  7"];
    [_list addObject:@"  8"];
    [_list addObject:@"  9"];

----------帧-----

NSError *error = nil;

    frameDuration = CMTimeMakeWithSeconds(1./5., 90000);