Question

我正在创建自定义视图，因为我添加了选择器，当did selected在选择i之后在索引方法中的行将从superView中删除选择器，但App将崩溃。如果不从superview删除它将不会崩溃。我能做什么请建议我。

我会在选择文本字段时使用选择器

 _rUsername=[[UITextField alloc]initWithFrame:CGRectMake(15, 270, self.view.frame.size.width-30, 30)];
            _rUsername.backgroundColor=[UIColor whiteColor];
            _rUsername.placeholder=@"Gander";
            [_rUsername addTarget:self action:@selector(showPicker)forControlEvents:UIControlEventEditingDidBegin];
[_registerView addSubview:_rUsername];

现在Picker方法存在问题

-(void) showPicker
{
    [_rUsername resignFirstResponder];
   UIPickerView *pickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(30,230,220,0)];

    pickerView.delegate = self;
    pickerView.dataSource = self;
    pickerView.showsSelectionIndicator = YES;
    [_registerView addSubview:pickerView];
}

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
    return [_arrayNo count];
}
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView     {
    return 1;
}

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
     return [_arrayNo objectAtIndex:row];
}
- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component {
    int sectionWidth = 300;
    return sectionWidth;
}

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{

    _rUsername.text=[_arrayNo objectAtIndex:row];
     [pickerView removeFromSuperview];

}

如果我从[pickerView removeFromSuperview];方法移除didselectRow，它将正常工作，但我想在选择选择器之后必须从超视图中移除。如果它不会崩溃并显示错误“（lldb）”像这样。

Answer 1

将其更改为以下内容：

var floatVal = 34.55;
value1 = Math.round(floatVal); // it will be 35 
$('#input1').attr("data-floatVal","34.55");
$('#input1').val(value1);
//it's important to parseFloat
value2 = parseFloat($("#input1).attr("data-floatVal"));

Answer 2

使用此 - [pickerView setHidden：YES];

选择它时PickerView didSelectRow将崩溃并显示（lldb）错误

2 个答案: