用戶在UITextField中完成使用後關閉UIPicker？

我有一個UIPicker只想在用戶選擇特定的UITextfield時顯示。我遇到的問題是這樣的：我添加了一個名爲myPicker的工作選取器和一個名爲field的文本字段。用戶在UITextField中完成使用後關閉UIPicker？

我已經看過幾個問題，但他們主要是關於讓picker彈出而不是picker，我沒有遇到過與我正確的答案。

我能夠通過更改文本框的inputView來顯示myPicker，但現在我的問題是我無法找到一種方法來添加附加的按鈕或許「完成」按鈕。

出於測試目的，我添加了動作一個簡單的按鈕：

self.myPicker.hidden = YES; 

[_field resignFirstResponder];

但是，這是給我一個奇怪的，非動畫的外觀，只是感覺不對。

這裏是我的這段代碼：

#import "ViewController.h" 

@interface MixerHPViewController() 
@property (weak, nonatomic) IBOutlet UILabel *testLabel; 
@property (weak, nonatomic) IBOutlet UITextField *field; 
@property (weak, nonatomic) IBOutlet UIPickerView *myPicker; 
@property (weak, nonatomic) IBOutlet UITextField *field2; 
- (IBAction)takeButton:(id)sender; 



@end 

@implementation ViewController 

@synthesize tempList; 



// returns the number of 'columns' to display. 
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView { 
    return 1; 
} 

// returns the # of rows in each component.. 
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component { 
    return [tempList count]; 
} 

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

- (void)pickerView:(UIPickerView *)pickerView 
     didSelectRow:(NSInteger)row 
     inComponent:(NSInteger)component { 

    CGFloat chosenValue; 

    switch (row) { 
     case 0: 
      chosenValue = 0.0000765; 
      break; 
     case 1: 
      chosenValue = 0.0000123; 
      break; 
     case 2: 
      chosenValue = 0.0000982; 
      break; 
     case 3: 
      chosenValue = 0.0000933; 
      break; 
     case 4: 
      chosenValue = 0.0000058; 
      break; 
     case 5: 
      chosenValue = 0.0000121; 
      break; 
     case 6: 
      chosenValue = 0.0000132; 
      break; 
     default: 
      chosenValue = 0; 
      break; 
    } 

NSNumberFormatter *formatter = [[NSNumberFormatter alloc]init]; 
    formatter.numberStyle = NSNumberFormatterDecimalStyle; 
    formatter.minimumFractionDigits=7; 

self.testLabel.text = [formatter stringFromNumber:@(chosenValue)]; 


} 

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

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view. 
    tempList = [[NSArray alloc] initWithObjects:@"OPTION A",@"OPTION B",@"OPTION C",@"OPTION D",@"OPTION F",@"OPTION G",@"OPTION H", nil]; 

} 

- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 





- (void)textFieldDidBeginEditing:(UITextField *)textField { 

    if(textField == self.field) { 
     self.field.inputView = _myPicker; 

    } 
} 



- (IBAction)takeButton:(id)sender { 
    self.myPicker.hidden = YES; 
    [_field resignFirstResponder]; 
} 
@end

來源

2013-07-11 vzm

你可以用動畫駁回：

- (IBAction)takeButton:(id)sender { 
    [UIView beginAnimations:nil context:nil]; 
    [UIView setAnimationDuration:0.5]; 
    [UIView setAnimationDelay:1.0]; 
    [UIView setAnimationCurve:UIViewAnimationCurveEaseOut]; 

    //you can customize this 
    self.myPicker.frame = CGRectMake(-100, -100, 100, 200); 

    [UIView commitAnimations]; 

    [self.myPicker removeFromSuperview]; 
    [_field resignFirstResponder]; 
    }

來源

2013-07-11 15:58:36 ApolloSoftware

用戶在UITextField中完成使用後關閉UIPicker？

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