Objective c 如何在UIPickerView中存储用户输入?
我的应用程序中当前有一个UIPickerView。有一个文本框,用户将在其中输入字符串,我希望该字符串保存在UIPickerView中,以便他们可以返回并点击它,而不是再次键入它Objective c 如何在UIPickerView中存储用户输入?,objective-c,xcode,ipad,ios4,Objective C,Xcode,Ipad,Ios4,我的应用程序中当前有一个UIPickerView。有一个文本框,用户将在其中输入字符串,我希望该字符串保存在UIPickerView中,以便他们可以返回并点击它,而不是再次键入它 我现在有一个数组,其中有一些文本,但我想知道在程序运行后如何添加它。假设pickerArray是您的数组名,其数据显示在pickerView中 你要做的是:- (void)textFieldDidEndEditing:(UITextField *)textField { [pickerArray addObject:
我现在有一个数组,其中有一些文本,但我想知道在程序运行后如何添加它。假设pickerArray是您的数组名,其数据显示在pickerView中 你要做的是:-
(void)textFieldDidEndEditing:(UITextField *)textField
{
[pickerArray addObject:textField.text];
[*yourPickerViewNmae* reloadAllCompononents];
}
我希望它能帮助您。愉快的编码:假设pickerArray是您的数组名,其数据显示在pickerView中 你要做的是:-
(void)textFieldDidEndEditing:(UITextField *)textField
{
[pickerArray addObject:textField.text];
[*yourPickerViewNmae* reloadAllCompononents];
}
我希望它能对您有所帮助。快乐编码:UIPickerDatasource可以获取要显示的项目数组,在您的情况下,您的数据是动态的,因为您需要在文本中输入数据,然后希望将其输入到选择器控件中
您需要一个NSMutableArray,可以在其中动态添加和删除对象。添加后,您可以调用选择器的reloadAllComponents方法来重新加载数据。UIPickerDatasource可以获取要显示的项目数组,在您的情况下,您的数据是动态的,因为您需要在文本中输入数据,然后希望将其输入选择器控件中
您需要一个NSMutableArray,可以在其中动态添加和删除对象。添加后,可以调用选择器的reloadAllComponents方法来重新加载数据。1.使用UITextField的委托函数,在委托函数中,将文本添加到所需的arryuse NSMutable数组中。1.使用UITextField的委托函数,在委托函数中,将文本添加到所需的arryuse NSMutable数组中。我已经完成并检查过了。它很好用 下面是代码
#import "pickerViewController.h"
@implementation pickerViewController
@synthesize textfield,picker,pickerarray,btn;
- (void)dealloc
{
[super dealloc];
[picker release];
[textfield release];
[pickerarray release];
[btn release];
}
- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - View lifecycle
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
[super viewDidLoad];
textfield.delegate=self;
picker.delegate=self;
picker.dataSource=self;
picker.showsSelectionIndicator=YES;
pickerarray=[[NSMutableArray alloc]init];
}
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
return 1;
}
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
return [pickerarray count];
}
-(void)textFieldDidEndEditing:(UITextField *)textField
{
textfield.delegate=self;
[pickerarray addObject:textField.text];
[picker reloadAllComponents];
NSLog(@"%@",pickerarray);
}
-(NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
return [pickerarray objectAtIndex:row];
}
-(IBAction)killkeyBoard:(id)sender
{
[textfield resignFirstResponder];
}
我已经检查过了。它很好用 下面是代码
#import "pickerViewController.h"
@implementation pickerViewController
@synthesize textfield,picker,pickerarray,btn;
- (void)dealloc
{
[super dealloc];
[picker release];
[textfield release];
[pickerarray release];
[btn release];
}
- (void)didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - View lifecycle
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
[super viewDidLoad];
textfield.delegate=self;
picker.delegate=self;
picker.dataSource=self;
picker.showsSelectionIndicator=YES;
pickerarray=[[NSMutableArray alloc]init];
}
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
return 1;
}
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
return [pickerarray count];
}
-(void)textFieldDidEndEditing:(UITextField *)textField
{
textfield.delegate=self;
[pickerarray addObject:textField.text];
[picker reloadAllComponents];
NSLog(@"%@",pickerarray);
}
-(NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
return [pickerarray objectAtIndex:row];
}
-(IBAction)killkeyBoard:(id)sender
{
[textfield resignFirstResponder];
}
非常感谢。那帮了大忙!非常感谢。那帮了大忙!