Question

我正在编写一个简单的代码，如下所示,,,,

- (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;
}

这是对RestaurantViewController.m的编码但按回车键时没有任何事情发生，

任何想法???

Answer 1

确保您的视图控制器采用<UITextFieldDelegate>协议。然后将每个UITextField的.delegate属性设置为self：

amount_textfield.delegate = self;

此外，您分配和初始化的所有内容都需要release。在这种情况下，这可能应该在addSubview:调用之后立即发生，它将每个这样的事物添加到超级视图。

Answer 2

你的.h文件应该是这样的

@interface Book : UIViewController<UITextFieldDelegate> {

UITextField * amount_textfield;

}

，您的实施文件应为：

    - (void)loadView {

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

- （BOOL）textFieldShouldReturn：（UITextField *）textField { [textField resignFirstResponder]; 返回是; }

Answer 3

您是否已将文本字段的代理连接到控制器？例如，restaurant_name.delegate = self？您必须对按下Return键时需要解除键盘的所有文本字段执行此操作。

当你在iphone中输入完成后如何解雇键盘？

3 个答案: