文本框選取器

我正在練習使用選取器將值輸入到文本字段中。我試着調整一些在這裏找到的代碼，以便在文本框被觸摸時顯示一個選擇器來填寫文本字段。文本框內置代碼SOURCE，我想在IB中構建文本框。然而，這已經停止了演示文稿選取器視圖，並且現在僅呈現鍵盤而不是文本框選取器

也許有人會指出我在這裏的正確方向。我的代碼：

#import <UIKit/UIKit.h> 

@interface pick2 : UIViewController 

<UIPickerViewDelegate, UIPickerViewDataSource> { 
UIPickerView *locationsPicker; 
UIToolbar *accessoryView; 

UITextField *text1; 


NSArray  *locations; 
} 

@property (nonatomic, readonly) UIPickerView *locationsPicker; 
@property (nonatomic, readonly) UIToolbar *accessoryView; 
@property (strong, nonatomic) IBOutlet UITextField *text1; 

- (void)onLocationSelection; 

@end

#import "pick2.h" 

@interface pick2() 

@end 

@implementation pick2 
@synthesize text1; 

- (UIPickerView *)locationsPicker { 
if (locationsPicker == nil) { 
    locationsPicker = [[UIPickerView alloc] init]; 
    locationsPicker.delegate = self; 
    locationsPicker.dataSource = self; 
    locationsPicker.showsSelectionIndicator = YES; 
} 

    return locationsPicker; 
} 

- (UIToolbar *)accessoryView { 
if (accessoryView == nil) { 
    accessoryView = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)]; 

    UIBarButtonItem *doneButton = [[UIBarButtonItem alloc]  initWithBarButtonSystemItem:UIBarButtonItemStylePlain 
                        target:self 
                        action:@selector(onLocationSelection)]; 
    [accessoryView setItems:[NSArray arrayWithObject:doneButton]]; 
} 

return accessoryView; 
} 

#pragma mark - Memory management 



    - (void)didReceiveMemoryWarning 
    { 
[super didReceiveMemoryWarning]; 
    } 

#pragma mark - View lifecycle 



- (void)onLocationSelection { 
NSInteger row = [self.locationsPicker selectedRowInComponent:0]; 

([text1 isFirstResponder]); { 
    text1.text = [locations objectAtIndex:row]; 
    [text1 resignFirstResponder]; 
} 
} 

- (BOOL)shouldAutorotateToInterfaceOrientation: (UIInterfaceOrientation)interfaceOrientation 
{ 
return (interfaceOrientation == UIInterfaceOrientationPortrait); 
} 

#pragma mark - picker view delegate/datasource 

- (NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row  forComponent:(NSInteger)component { 
return [locations objectAtIndex:row]; 
} 

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView { 
return 1; 
} 

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:  (NSInteger)component { 
return [locations count]; 
} 


- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil 
{ 
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 
if (self) { 
    // Custom initialization 
} 
return self; 
} 

- (void)viewDidLoad 
{ 

locations = [[NSArray alloc] initWithObjects:@"New York", @"Chicago", @"Memphis", @"California", @"Seattle",@"London",@"Paris", nil]; 


[super viewDidLoad]; 
// Do any additional setup after loading the view. 
} 

- (void)viewDidUnload 
{ 
[self setText1:nil]; 
[super viewDidUnload]; 

} 


@end

來源

2012-07-29 JSA986

所有你需要做的就是給你的UITextField的inputView爲您pickerview的對象。

text1.inputView = locationsPicker;

點擊UITextField將顯示pickerview現在。

來源

2012-07-29 12:42:59

感謝的是，無論在哪裏我把這些代碼我剛剛得到的標準鍵盤呈現排序呢？ – JSA986 2012-07-29 13:12:03

通過IB建立文本框和

NSInteger selectedRow = [select selectedRowInComponent:0]; text1.text = [arrStatus objectAtIndex: selectedRow]; [text1 resignFirstResponder];

以檢索文本值

來源

2012-07-30 10:14:42 JSA986

文本框選取器

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