我是 Objective-C 的新手
我想UIDatePicker在按钮单击后在弹出窗口中显示 ..
我有一个按钮，当我单击该按钮时，我的弹出窗口应该与 DatePicker 一起出现，然后在选择日期后弹出窗口应该关闭并在文本框中设置选定的日期。
我怎样才能做到这一点 ？
为了创建一个日期选择器，我编写了这段代码..
UIDatePicker *datePicker=[[[UIDatePicker alloc] init] autorelease];
datePicker.datePickerMode=UIDatePickerModeDate;
[self.view addSubview:datePicker];
但我不知道如何在按钮单击的弹出窗口中显示它..？
试试这个，这可以帮助你
-(IBAction)DatePickerAction:(id)sender
{
UIActionSheet *menu = [[UIActionSheet alloc] initWithTitle:@"Date Picker"
delegate:self
cancelButtonTitle:@"Cancel"
destructiveButtonTitle:nil
otherButtonTitles:nil];
// Add the picker
UIDatePicker *pickerView = [[UIDatePicker alloc] init];
pickerView.datePickerMode = UIDatePickerModeDate;
[menu addSubview:pickerView];
[menu showInView:self.view];
[menu setBounds:CGRectMake(0,0,320, 500)];
CGRect pickerRect = pickerView.bounds;
pickerRect.origin.y = -100;
pickerView.bounds = pickerRect;
[pickerView release];
[menu release];
}
您可以将文本字段的 .inputView 属性设置为日期选择器。
所以myTextField.inputView = datePicker;
这将替换 datePicker 的键盘输入视图。
更深入一点，您需要为日期选择器的值更改时添加一个目标（因此它会更新文本字段）
让我知道这是否是您想要的方式。
如果您仍然想要弹出窗口，我不确定您是否可以为此子类化UIAlertView..
或者您可以将 datePicker 添加到一个UIView实例中，然后使用一些精美的动画等将其添加到屏幕上......
有很多选择，我很乐意为您提供帮助...
.h 文件中的声明
UIActionSheet *aac;
UIDatePicker *theDatePicker;
.m 文件中的实现
// 在注释后添加代码
-(void)DatePickerDoneClick:(id)sender {
NSDateFormatter *df=[[[NSDateFormatter alloc]init] autorelease];
df.dateFormat = @"MM/dd/yyyy";
NSArray *temp=[[NSString stringWithFormat:@"%@",[df stringFromDate:theDatePicker.date]] componentsSeparatedByString:@""];
[dateString1 release];
dateString1=nil;
dateString1 = [[NSString alloc]initWithString:[temp objectAtIndex:0]];
UITextField* BirthDayTxtLBl.text = [NSString stringWithFormat:@" %@",dateString1];
NSString *theTime = [NSString stringWithFormat:@"%@",BirthDayTxtLBl.text];
NSLog(@"%@",theTime);
[aac dismissWithClickedButtonIndex:0 animated:YES];
}
- (void)DatePickercancelClick:(id)sender{
[aac dismissWithClickedButtonIndex:0 animated:YES];
}
-(IBAction)AddTheTimePicker:(id)sendar {
aac = [[UIActionSheet alloc] initWithTitle:[self isViewPortrait]?@"\n\n":nil delegate:self cancelButtonTitle:nil destructiveButtonTitle:nil otherButtonTitles:nil];
theDatePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(0.0, 44.0, 0.0, 0.0)];
theDatePicker.datePickerMode=UIDatePickerModeDateAndTime;
UIToolbar *pickerDateToolbar = [[UIToolbar alloc] initWithFrame:[self isViewPortrait]?CGRectMake(0, 0, 320, 44):CGRectMake(0, 0, 320, 44)];
pickerDateToolbar.barStyle = UIBarStyleBlackOpaque;
[pickerDateToolbar sizeToFit];
NSMutableArray *barItems = [[NSMutableArray alloc] init];
UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(DatePickerDoneClick:)];
//doneBtn.tag = tagID;
[barItems addObject:doneBtn];
UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
UILabel *toolBarItemlabel;
if([self interfaceOrientation] == UIInterfaceOrientationPortraitUpsideDown || [self interfaceOrientation] == UIInterfaceOrientationPortrait)
toolBarItemlabel= [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 180,30)];
else
toolBarItemlabel = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 200,30)];
[toolBarItemlabel setTextAlignment:UITextAlignmentCenter];
[toolBarItemlabel setTextColor:[UIColor whiteColor]];
[toolBarItemlabel setFont:[UIFont boldSystemFontOfSize:16]];
[toolBarItemlabel setBackgroundColor:[UIColor clearColor]];
toolBarItemlabel.text = [NSString stringWithFormat:@"Select Start Time"];
UIBarButtonItem *buttonLabel =[[UIBarButtonItem alloc]initWithCustomView:toolBarItemlabel];
[toolBarItemlabel release];
[barItems addObject:buttonLabel];
[buttonLabel release];
[barItems addObject:flexSpace];
UIBarButtonItem *SelectBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCancel target:self action:@selector(DatePickercancelClick:)];
[barItems addObject:SelectBtn];
[pickerDateToolbar setItems:barItems animated:YES];
[aac addSubview:pickerDateToolbar];
[aac addSubview:theDatePicker];
CGRect myImageRect = CGRectMake(0.0f, 300.0f, 320.0f, 175.0f);;
[aac showFromRect:myImageRect inView:self.view animated:YES ];
[UIView beginAnimations:nil context:nil];
if([self interfaceOrientation] == UIInterfaceOrientationPortraitUpsideDown || [self interfaceOrientation] == UIInterfaceOrientationPortrait)
[aac setBounds:CGRectMake(0,0,320, 464)];
else
[aac setBounds:CGRectMake(0,0,480, 400)];
[UIView commitAnimations];
}
// Add this if you wish to add support Orientation support for picker
- (BOOL) isViewPortrait {
UIInterfaceOrientation currentOrientation = [UIApplication sharedApplication].statusBarOrientation;
return (currentOrientation == UIInterfaceOrientationPortrait || currentOrientation == UIInterfaceOrientationPortraitUpsideDown);
}
写在你的 Button Click 方法中
self.DatePicker= [[UIDatePicker alloc] initWithFrame:CGRectMake(0, 0, 320, 216)];
self.DatePicker.datePickerMode = UIDatePickerModeDate;
[self.DatePicker addTarget:self
action:@selector(SetDatePickerTime:)
forControlEvents:UIControlEventValueChanged];
[self.view addSubview:self.DatePicker];
- (void)SetDatePickerTime:(id)sender
{
[self.DatePicker removeFromSuperview];
NSDateFormatter *outputFormatter = [[NSDateFormatter alloc] init];
[outputFormatter setDateFormat:@"dd:MM:yyyy"];
NSLog(@"%@",[outputFormatter stringFromDate:self.DatePicker.date]);
}
最好的方法是创建类似的动画..我尝试使用扩展至 uiview..
在要在正常实现上方显示弹出窗口的 .m 文件中尝试以下操作
@interface UIView (AlertAnimation)
- (void)doPopInAnimation;
@end
const NSTimeInterval kAnimationDuration = 0.3f;
@implementation UIView (AlertAnimation)
- (void) doPopInAnimation {
CALayer *viewLayer = self.layer;
CAKeyframeAnimation *popInAnimation = [CAKeyframeAnimation animationWithKeyPath:@"transform.scale"];
popInAnimation.duration = 0.3f;
popInAnimation.values = [NSArray arrayWithObjects:[NSNumber numberWithFloat:0.6], [NSNumber numberWithFloat:1.2], [NSNumber numberWithFloat:0.9], [NSNumber numberWithFloat:1], nil];
popInAnimation.keyTimes = [NSArray arrayWithObjects:[NSNumber numberWithFloat:0.0], [NSNumber numberWithFloat:0.6], [NSNumber numberWithFloat:0.8], [NSNumber numberWithFloat:1.0], nil];
[viewLayer addAnimation:popInAnimation forKey:@"transform.scale"];
}
@end
进一步把这条神奇的线放在你想要弹出的事件上
[yourPickerView doPopInAnimation];
参考这段代码
startDatePicker = [[UIDatePicker alloc] init];
startDatePicker.datePickerMode = UIDatePickerModeDate;
[startDatePicker addTarget:self action:@selector(startLabelChange:)forControlEvents:UIControlEventValueChanged];
CGSize pickerSize = [startDatePicker sizeThatFits:CGSizeZero];
startDatePicker.frame = CGRectMake(-40, -20, pickerSize.width, pickerSize.height);
startDatePicker.transform = CGAffineTransformMakeScale(0.750f, 0.750f);
UIViewController *pickerController = [[UIViewController alloc] init];
[pickerController.view addSubview:startDatePicker];
[startDatePicker release];
[pickerController setContentSizeForViewInPopover:CGSizeMake(240, 180)];
UIPopoverController *pickerPopover = [[UIPopoverController alloc] initWithContentViewController:pickerController];
[pickerPopover presentPopoverFromRect:startDatelabel.frame
inView:rightSideView
permittedArrowDirections:UIPopoverArrowDirectionLeft
animated:YES];
pickerPopover.delegate = self;
self.popover = pickerPopover;
[pickerController release];
[pickerPopover release];