UIDatePicker 不隐藏

Posted 2023-03-11

【中文标题】UIDatePicker 不隐藏

【英文标题】：UIDatePicker not hiding

【发布时间】：2012-05-24 05:19:22

【问题描述】：

我以编程方式创建了一个 UIDatePicker，并通过一种方法将所选值设置为文本字段。但是该值没有进入文本字段并且选择器没有隐藏。谁能帮我？我的代码在这里

 datePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(0, 245, 320, 270)];
[self.view addSubview:datePicker];
datePicker.hidden=YES;
[datePicker release];
datePicker.datePickerMode = UIDatePickerModeDate;
NSDateFormatter *outputFormatter = [[NSDateFormatter alloc] init];
[outputFormatter setDateFormat:@"yyyy:MMMM:dd"];
self.dobtxt.text = [outputFormatter stringFromDate:self.datePicker.date];
[outputFormatter release];
[DoneBtnDate setBackgroundImage: [UIImage imageNamed: @"OTdone.png"] forState:UIControlStateNormal];
PickerDoneviewDate=[[UIView alloc]initWithFrame:CGRectMake(0,210, 320, 35)];
PickerDoneviewDate.backgroundColor=[UIColor clearColor];
PickerDoneviewDate.backgroundColor=[UIColor colorWithPatternImage:[UIImage imageNamed:@"MFC_tab_01.png"]];
DoneBtnDate = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[DoneBtnDate addTarget:self action:@selector(DatePickerDone:)forControlEvents:UIControlEventTouchDown];
DoneBtnDate.frame = CGRectMake(245,5, 70, 30);
[PickerDoneviewDate addSubview:DoneBtnDate];
[self.view addSubview:PickerDoneviewDate];
PickerDoneviewDate.hidden=YES;


   -(void)DatePickerDone:(id)sender

NSDateFormatter *outputFormatter = [[NSDateFormatter alloc] init];
[outputFormatter setDateFormat:@"yyyy:MMMM:dd"];

self.dobtxt.text = [outputFormatter stringFromDate:self.datePicker.date];
[datePicker release]; 
[datePicker setHidden:TRUE];

PickerDoneviewDate.hidden=YES;
[outputFormatter release];

添加文本字段的代码

    dobtxt = [[UITextField alloc] initWithFrame:CGRectMake(150, 120, 133, 26)];
    dobtxt.borderStyle = UITextBorderStyleNone;
    dobtxt.background=[UIImage imageNamed: @"textbox_small.png"];
    dobtxt.font = [UIFont fontWithName:@"Arial" size:13];
    dobtxt.delegate = self;
    dobtxt.userInteractionEnabled=YES;
    dobtxt.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter; 
    [scroll addSubview:dobtxt];

【问题讨论】：

添加 self.dobtxt.text = @"test"; [滚动 addSubview:dobtxt] 之前；检查测试是否会在那里。

是的，它在该文本字段中显示测试

如何替换“self.dobtxt.text = [outputFormatter stringFromDate:self.datePicker.date];”到 "self.dobtxt.text = @"test""?

没有它是空的......即使我删除了自我，它也是空的

只是 NSLog(@"%@", self.dobtxt);在两个地方检查是否有相同的实例。

【参考方案1】：

datePicker 是一个属性，它会被自动释放。请删除

[datePicker release]; 


self.datePicker = [[[UIDatePicker alloc] initWithFrame:CGRectMake(0, 245, 320, 270)] autorelease];
[self.view addSubview:datePicker];
self.datePicker.hidden=YES;
//[datePicker release];
datePicker.datePickerMode = UIDatePickerModeDate;
NSDateFormatter *outputFormatter = [[NSDateFormatter alloc] init];
[outputFormatter setDateFormat:@"yyyy:MMMM:dd"];
self.dobtxt.text = [outputFormatter stringFromDate:self.datePicker.date];
[outputFormatter release];
[DoneBtnDate setBackgroundImage: [UIImage imageNamed: @"OTdone.png"] forState:UIControlStateNormal];
PickerDoneviewDate=[[UIView alloc]initWithFrame:CGRectMake(0,210, 320, 35)];
PickerDoneviewDate.backgroundColor=[UIColor clearColor];
PickerDoneviewDate.backgroundColor=[UIColor colorWithPatternImage:[UIImage imageNamed:@"MFC_tab_01.png"]];
DoneBtnDate = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[DoneBtnDate addTarget:self action:@selector(DatePickerDone:)forControlEvents:UIControlEventTouchDown];
DoneBtnDate.frame = CGRectMake(245,5, 70, 30);
[PickerDoneviewDate addSubview:DoneBtnDate];
[self.view addSubview:PickerDoneviewDate];
 self.PickerDoneviewDate.hidden=YES;


-(void)DatePickerDone:(id)sender

NSDateFormatter *outputFormatter = [[NSDateFormatter alloc] init];
[outputFormatter setDateFormat:@"yyyy:MMMM:dd"];

self.dobtxt.text = [outputFormatter stringFromDate:self.datePicker.date];
//[datePicker release]; 
[datePicker setHidden:TRUE];

PickerDoneviewDate.hidden=YES;
[outputFormatter release];

【讨论】：

@priya 你对这两个版本发表评论了吗？

是评论了两行仍然文本字段为空并且日期选择器没有隐藏

@priya dobtxt 是一个出口吗？你连接到视图了吗？

dobtext 是以编程方式创建的文本字段。它在滚动视图中... [scroll addSubview:dobtxt];

你有 NSLog [outputFormatter stringFromDate:self.datePicker.date] 来检查是否有任何字符串输出？