如何在iPhone上完成輸入時關閉鍵盤？

我寫一個簡單的代碼，如下,,,,如何在iPhone上完成輸入時關閉鍵盤？

- (void)viewDidLoad { 
    [super viewDidLoad]; 


    restaurant_name = [[UILabel alloc] initWithFrame:CGRectMake(20, 83, 135, 21)]; 
    [restaurant_name setBackgroundColor:[UIColor clearColor]]; 
    [restaurant_name setText: @"Restaurant Name"]; 
    [self.view addSubview:restaurant_name]; 

    restaurant_name_textfield = [[UITextField alloc] initWithFrame:CGRectMake(160, 80, 150, 31)]; 
    [restaurant_name_textfield setBackgroundColor:[UIColor clearColor]]; 
    [restaurant_name_textfield setBorderStyle:UITextBorderStyleRoundedRect]; 
    [restaurant_name_textfield resignFirstResponder]; 
    [self.view addSubview:restaurant_name_textfield]; 

    restaurant_name_save = restaurant_name_textfield.text; 
    //NSLog(restaurant_name_save); 

    picker_delivery = [[UILabel alloc] initWithFrame:CGRectMake(115, 113, 110, 25)]; 
    [picker_delivery setBackgroundColor:[UIColor clearColor]]; 
    [picker_delivery setFont:[UIFont fontWithName:@"Arial" size:18]]; 
    [picker_delivery setText: @"Pick/Delivery"]; 

    [self.view addSubview:picker_delivery]; 

    amount = [[UILabel alloc] initWithFrame:CGRectMake(20, 153, 150, 20)]; 
    [amount setText: @"Amount"]; 
    [amount setBackgroundColor:[UIColor clearColor]]; 
    [self.view addSubview:amount]; 

    amount_textfield = [[UITextField alloc] initWithFrame:CGRectMake(160,150 , 150, 31)]; 
    [amount_textfield setBackgroundColor:[UIColor clearColor]]; 
    [amount_textfield setBorderStyle:UITextBorderStyleRoundedRect]; 
    [self.view addSubview:amount_textfield]; 

    ready_in = [[UILabel alloc] initWithFrame:CGRectMake(20, 188, 150, 20)]; 
    [ready_in setText:@"Ready in"]; 
    [ready_in setBackgroundColor:[UIColor clearColor]]; 
    [self.view addSubview:ready_in]; 

    ready_in_textfield = [[UITextField alloc] initWithFrame:CGRectMake(160, 185, 150, 31)]; 
    [ready_in_textfield setBackgroundColor:[UIColor clearColor]]; 
    [ready_in_textfield setBorderStyle:UITextBorderStyleRoundedRect]; 
    [self.view addSubview:ready_in_textfield]; 

    reminder = [[UILabel alloc] initWithFrame:CGRectMake(20, 230, 150, 20)]; 
    [reminder setText: @"Reminder"]; 
    [reminder setBackgroundColor:[UIColor clearColor]]; 
    [self.view addSubview:reminder]; 

    mySwitch = [[UISwitch alloc] initWithFrame:CGRectMake(220, 230, 50, 50)]; 
    [self.view addSubview:mySwitch]; 



    start_button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 
    [start_button setFrame:CGRectMake(100, 300, 100, 50)]; 
    [start_button setTitle:@"Start" forState:UIControlStateNormal]; 
    //[myButton setImage:myButtonImage forState:UIControlStateNormal]; 

    [start_button addTarget:self action:@selector(saveData) 
     forControlEvents:UIControlEventTouchUpInside]; 



     [self.view addSubview:start_button]; 


} 



-(BOOL) textFieldShouldReturn:(UITextField*) textField { 
    [textField resignFirstResponder]; 
    return YES; 
}

這是編碼RestaurantViewController.m 但是當我按下回車鍵什麼也沒發生，

任何想法???

來源

2011-02-02 Veer Suthar

歡迎來到SO！我編輯了你的帖子，把你的代碼放到代碼塊中。將來，當您將代碼粘貼到問題中時，您需要點擊「{}」按鈕以將其包裝在代碼塊中，或者在每行的左邊緣放置四個空格。 – 2011-02-02 13:08:48

您的.h文件中應該有是這樣

@interface Book : UIViewController<UITextFieldDelegate> {

的UITextField * amount_textfield;

}

以及實現文件應該是：

- (void)loadView { 

amount_textfield = [[UITextField alloc] initWithFrame:CGRectMake(60, 120, 200, 40)]; 
amount_textfield.delegate=self; 
[ContentView addSubview:amount_textfield];}

- （BOOL）textFieldShouldReturn：（*的UITextField）文本框{ [文本字段resignFirstResponder]; return是; }

來源

2011-02-02 13:51:15 Prabh

您是否已將文本字段的代表連接到控制器？例如，restaurant_name.delegate = self？您必須對所有需要在按回車鍵時都解除鍵盤的文本字段執行此操作。

來源

2011-02-02 13:10:20

不，我沒有寫過你寫的東西，我應該在哪裏寫？ – 2011-02-02 13:15:30

確保您的視圖控制器採用<UITextFieldDelegate>協議。然後每個UITextFields的.delegate屬性設置爲self：

amount_textfield.delegate = self;

而且，一切，你的alloc和init必須release「版。在這種情況下，這應該會在addSubview:調用之後立即發生，這會將每個這樣的事情添加到超級視圖。

來源

2011-02-02 13:10:46

我採用了，就像這裏寫的@interface RestaurantViewController：UIViewController – 2011-02-02 13:13:35

我應該在哪裏寫amount_textfield.delegate = self？ – 2011-02-02 13:14:59

如何在iPhone上完成輸入時關閉鍵盤？

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