UIPickerview没有出现在正确的位置

Question

很抱歉问这么愚蠢的问题，但我不知道为什么带有完成按钮的UIPickerView没有出现在正确的位置。我使用以下代码，但我不知道为什么我会遇到这样的问题。

actionSheet=[[UIActionSheet alloc] initWithTitle:@"" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil];


UIToolbar *pickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0,320,40)];

[pickerToolbar sizeToFit];
pickerToolbar.barStyle = UIBarStyleBlackTranslucent;
NSMutableArray *barItems = [[NSMutableArray alloc] init];

UIBarButtonItem *cancelBtn = [[UIBarButtonItem alloc] initWithTitle:@"Cancel" style:UIBarButtonSystemItemCancel target:self action:@selector(cancelButtonTapped:)];
[barItems addObject:cancelBtn];

UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
[barItems addObject:flexSpace];

UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(doneButtonTapped:)];
[barItems addObject:doneBtn];

[pickerToolbar setItems:barItems animated:YES];
[actionSheet addSubview:pickerToolbar];


//-----------
maritalStatusPickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 44, 320, 216)];
maritalStatusPickerView.delegate = self;
maritalStatusPickerView.showsSelectionIndicator = YES;


[actionSheet addSubview:maritalStatusPickerView];

[actionSheet showInView:self];

Answer 1

使用下面的代码

actionSheet=[[UIActionSheet alloc] initWithTitle:@"" delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil];
actionSheet.frame = CGRectMake(0, 234, 320, 256);

UIToolbar *pickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0,320,40)];

[pickerToolbar sizeToFit];
pickerToolbar.barStyle = UIBarStyleBlackTranslucent;
NSMutableArray *barItems = [[NSMutableArray alloc] init];

UIBarButtonItem *cancelBtn = [[UIBarButtonItem alloc] initWithTitle:@"Cancel" style:UIBarButtonSystemItemCancel target:self action:@selector(cancelButtonTapped:)];
[barItems addObject:cancelBtn];

UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil];
[barItems addObject:flexSpace];

UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(doneButtonTapped:)];
[barItems addObject:doneBtn];

[pickerToolbar setItems:barItems animated:YES];
[actionSheet addSubview:pickerToolbar];


//-----------
maritalStatusPickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 44, 320, 216)];
maritalStatusPickerView.delegate = self;
maritalStatusPickerView.showsSelectionIndicator = YES;
//        [self addSubview:maritalStatusPickerView];

[actionSheet addSubview:maritalStatusPickerView];

[self.view addSubview:actionSheet];

Answer 2

为什么要添加maritalStatusPickerView 2次

[self addSubview:maritalStatusPickerView];

[actionSheet addSubview:maritalStatusPickerView];

Answer 3

只需在初始化后将动作表框架包含在您的代码中

actionSheet.frame = CGRectMake(0, 0, 320, 256);

参考此question

Answer 4

您必须在视图中添加操作表，如果要从视图底部打开pickerview，请更改co-Ordinate。

[actionSheet addSubview:maritalStatusPickerView];

//Replace this :  [actionSheet showInView:self];

[self.view addSubview:actionSheet];