自定义UIDatePicker的调整代码

  • Z时代
  • 2024-01-10
  • 分类：问答

所以我发现这个惊人的代码在这里弹出一个UIDatePicker。 （Matthias Bauch的荣誉） 我想用自定义选取轮来定制它，但代码处于复杂度级别，我不知道如何去切换到UIPicker以及如何用我的填充选择器阵列。自定义UIDatePicker的调整代码

这里是原代码：

- (void)changeDate:(UIDatePicker *)sender { 
    NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init]; 
    [dateFormat setDateFormat:@"cccc, MMM d, hh:mm aa"]; 
    NSString *formattedVersion = [dateFormat stringFromDate:sender.date]; 
    NSLog(@"%@",formattedVersion); 
} 
- (void)removeViews:(id)object { 
[[self.view viewWithTag:9] removeFromSuperview]; 
[[self.view viewWithTag:10] removeFromSuperview]; 
[[self.view viewWithTag:11] removeFromSuperview]; 
} 
- (void)dismissDatePicker:(id)sender { 
CGRect toolbarTargetFrame = CGRectMake(0, self.view.bounds.size.height, 320, 44); 
CGRect datePickerTargetFrame = CGRectMake(0, self.view.bounds.size.height+44, 320, 216); 
[UIView beginAnimations:@"MoveOut" context:nil]; 
[self.view viewWithTag:9].alpha = 0; 
[self.view viewWithTag:10].frame = datePickerTargetFrame; 
[self.view viewWithTag:11].frame = toolbarTargetFrame; 
[UIView setAnimationDelegate:self]; 
[UIView setAnimationDidStopSelector:@selector(removeViews:)]; 
[UIView commitAnimations]; 
} 
- (IBAction)callDP:(id)sender { 
if ([self.view viewWithTag:9]) { 
    return; 
} 
CGRect toolbarTargetFrame = CGRectMake(0, self.view.bounds.size.height-216-44, 320, 44); 
CGRect datePickerTargetFrame = CGRectMake(0, self.view.bounds.size.height-216, 320, 216); 
UIView *darkView = [[[UIView alloc] initWithFrame:self.view.bounds] autorelease]; 
darkView.alpha = 0; 
darkView.backgroundColor = [UIColor blackColor]; 
darkView.tag = 9; 
UITapGestureRecognizer *tapGesture = [[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(dismissDatePicker:)] autorelease]; 
[darkView addGestureRecognizer:tapGesture]; 
[self.view addSubview:darkView]; 
UIDatePicker *datePicker = [[[UIDatePicker alloc] initWithFrame:CGRectMake(0, self.view.bounds.size.height+44, 320, 216)] autorelease]; 
datePicker.tag = 10; 
[datePicker addTarget:self action:@selector(changeDate:) forControlEvents:UIControlEventValueChanged]; 
[self.view addSubview:datePicker]; 
UIToolbar *toolBar = [[[UIToolbar alloc] initWithFrame:CGRectMake(0, self.view.bounds.size.height, 320, 44)] autorelease]; 
toolBar.tag = 11; 
toolBar.barStyle = UIBarStyleBlackTranslucent; 
UIBarButtonItem *spacer = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil] autorelease]; 
UIBarButtonItem *doneButton = [[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(dismissDatePicker:)] autorelease]; 
[toolBar setItems:[NSArray arrayWithObjects:spacer, doneButton, nil]]; 
[self.view addSubview:toolBar]; 
[UIView beginAnimations:@"MoveIn" context:nil]; 
toolBar.frame = toolbarTargetFrame; 
datePicker.frame = datePickerTargetFrame; 
darkView.alpha = 0.5; 
[UIView commitAnimations]; 
}

我想补充我UIPicker与拣货机轮这些值：

Days=[[NSArray alloc] initWithObjects: @"Today", @"Tomorrow", nil]; 
    Hours = [[NSArray alloc] initWithObjects:@"1", @"2", @"3", @"4", @"5", @"6", @"7", @"8", @"9", @"10", @"11", @"12", nil]; 
    Minutes=[[NSArray alloc] initWithObjects:@"05", @"10", @"15", @"20", @"25", @"30", @"35", @"40", @"45", @"50", @"55", nil];

任何帮助/指导将非常感激！

感谢， 垫

回答：

您将需要使用UIPickerView代替UIDatePicker的。然后您需要提供适当的委托方法来为其提供数据。

首先创建一个数组来保存项目，将可在选择器：

NSMutableArray *arrayColors = [[NSMutableArray alloc] init]; 
[arrayColors addObject:@"Red"]; 
[arrayColors addObject:@"Orange"];

实施拾取数据源的方法：

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)thePickerView { 
    return 1; 
} 
- (NSInteger)pickerView:(UIPickerView *)thePickerView numberOfRowsInComponent:(NSInteger)component { 
return [arrayColors count]; 
} 
- (NSString *)pickerView:(UIPickerView *)thePickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component { 
return [arrayColors objectAtIndex:row]; 
}

和委托方法得到什么项目的用户选择：

- (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component { 
NSLog(@"Selected Color: %@. Index of selected color: %i", [arrayColors objectAtIndex:row], row); 
}

这里是documentation和良好的tutorial

更新

要创建一个UIPickerView编程确保它看起来是这样的：

//Make sure our class knows we have picker delegate/data source methods in it 
@interface myViewController : UIViewController <UIPickerViewDataSource, UIPickerViewDelegate>

创建

//Picker creation 
UIPickerView *myPickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 200, 320, 200)]; 
myPickerView.delegate = self; 
myPickerView.showsSelectionIndicator = YES; 
[self.view addSubview:myPickerView];

一个方便的委托方法

// tell the picker the width of each row for a given component. no necessary but helpful if need be 
- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component { 
int sectionWidth = 300; 
return sectionWidth; 
}

回答：

添加随机的评论。如果您想在按下UITextField将信息输入到文本字段时使用此拾取器替换键盘，请按以下步骤操作。

[<Your UI text field> setInputView:<your picker view>];

例如：

NSMutableArray *pickerData = [[NSMutableArray alloc]initWithObjects:@"",@"1", @"2", @"3", @"4", @"5", @"6", @"7", nil]; 
UIPickerView *myPickerView = [[UIPickerView alloc]init]; 
myPickerView.delegate = self; 
myPickerView.dataSource = self; 
myPickerView.showsSelectionIndicator = YES; 
[self.myTexfield setInputView:myPickerView];

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