我创建了一个文本字段,在输入时将打开一个带有包含完成按钮的工具栏的选择器 View 。但是,当按下完成按钮时,选择器 View 不会关闭。除了这个,其他一切都按我想要的方式工作。我尝试了几种选择都无济于事。请检查并让我知道我遗漏了什么。
我的代码如下:
ViewController.h
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController
{IBOutlet UITextField *productDescription; IBOutlet UIPickerView *productPicker; NSArray *productListArray
ViewController.m
#import "ViewController.h"
@interface ViewController ()
@end
@implementation ViewController
-(void)addPickerView{
productListArray = [[NSArray alloc]initWithObjects:
@"myArray", nil];
productDescription.delegate = self;
[self.view addSubview:productDescription];
[productDescription setPlaceholder:@"Product Description"];
productPicker = [[UIPickerView alloc]init];
productPicker.dataSource = self;
productPicker.delegate = self;
productPicker.showsSelectionIndicator = YES;
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc]
initWithTitle:@"Done" style:UIBarButtonItemStyleDone
target:self action:@selector(resignFirstResponder)];
UIToolbar *toolBar = [[UIToolbar alloc]initWithFrame:
CGRectMake(50, 320, 50, 50)];
[toolBar setBarStyle:UIBarStyleBlackOpaque];
NSArray *toolbarItems = [NSArray arrayWithObjects:
doneButton, nil];
[toolBar setItems:toolbarItems];
productDescription.inputView = productPicker;
productDescription.inputAccessoryView = toolBar;
}
- (void)viewDidLoad
{
[super viewDidLoad];
[self addPickerView];
}
#pragma mark - Text field delegates
-(void)textFieldDidBeginEditing:(UITextField *)textField
{
([textField.text isEqualToString:@""]);
}
#pragma mark - Picker View Data source
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
return 1;
}
-(NSInteger)pickerView:(UIPickerView *)pickerView
numberOfRowsInComponent:(NSInteger)component{
return [productListArray count];
}
#pragma mark- Picker View Delegate
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:
(NSInteger)row inComponent:(NSInteger)component{
[productDescription setText:[productListArray objectAtIndex:row]];
}
- (void)doneButton:(UIBarButtonItem *)sender{
NSLog(@"Done Touched");
[productPicker setHidden:YES];
}
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:
(NSInteger)row forComponent:(NSInteger)component{
return [productListArray objectAtIndex:row];
}
@end
最佳答案
.M File
Xib 文件获取 Textfield 并使用连接设置委托(delegate)。
#import "YourViewController.h"
@interface YourViewController ()<UIPickerViewDataSource,UIPickerViewDelegate>
{
UIPickerView *productPicker;
NSArray *productListArray;
IBOutlet UITextField *productDescription;
}
@end
- (void)viewDidLoad
{
[super viewDidLoad];
[self addPickerView];
}
-(void)addPickerView
{
productListArray = [[NSArray alloc]initWithObjects:@"myArray",@"Rohit",@"Change",@"Your view", nil];
[productDescription setPlaceholder:@"Product Description"];
productPicker = [[UIPickerView alloc]init];
productPicker.dataSource = self;
productPicker.delegate = self;
productPicker.showsSelectionIndicator = YES;
UIToolbar* toolBar = [[UIToolbar alloc] init];
toolBar.barStyle = UIBarStyleBlack;
toolBar.translucent = YES;
toolBar.tintColor = nil;
[toolBar sizeToFit];
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc]initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(doneButton:)];
[toolBar setItems:[NSArray arrayWithObjects:doneButton, nil]];
productDescription.inputView = productPicker;
productDescription.inputAccessoryView = toolBar;
}
- (IBAction)doneButton:(id)sender
{
NSLog(@"Done Touched");
[productPicker removeFromSuperview];
[productPicker resignFirstResponder];
[self.view endEditing:YES];
}
#pragma mark - Text field delegates
- (void)textFieldDidBeginEditing:(UITextField *)textField {
productDescription.inputView = productPicker;
}
#pragma mark - Text field delegates
- (void)textFieldDidBeginEditing:(UITextField *)textField {
productDescription.inputView = productPicker;
}
#pragma mark - Picker View Data source
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
return 1;
}
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{
return [productListArray count];
}
#pragma mark- Picker View Delegate
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
[productDescription setText:[productListArray objectAtIndex:row]];
}
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{
return [productListArray objectAtIndex:row];
}
我希望这对你有帮助。
关于ios - 按下“完成”按钮时 PickerView 不会关闭,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/32875525/