ios - 以编程方式创建的按钮不响应用户的点击

Question

我知道这种问题在这里讨论过几次，但是我已经搜索并尝试过但没有成功。我正在尝试在常规菜单顶部创建一个简单的登录 View 。此登录页面包含 2 个文本字段(用户名和密码)和 1 个按钮(登录)。我的问题是，虽然当我点击登录按钮时一切看起来都很完美，但没有响应。

*登录 View 使用 moveTo 方法从起点到终点进行动画处理。评论那部分，但仍然没有回应。

主.m

- (void)viewDidLoad
{

    prefs = [NSUserDefaults standardUserDefaults];

    if (![prefs objectForKey:@"userName"]) {
        LoginScreen *login = [[LoginScreen alloc] initWithFrame:CGRectMake(35, 400, 250, 350)];
        [self.view addSubview:login];
        [login moveTo:CGPointMake(35.0, 65.0) duration:0.6 option:UIViewAnimationOptionCurveEaseOut];  
    }        

    [super viewDidLoad];
}

登录界面.m

@synthesize login;

    - (id)initWithFrame:(CGRect)frame
    {
         self = [super initWithFrame:frame];
         if (self) {

             self.layer.masksToBounds = YES;
             self.userInteractionEnabled = YES;

             [self addButton:login withTitle:@"Login" andSize:CGRectMake(85, 200, 90, 35)];
             [login addTarget:self action:@selector(attemptLogin)
                   forControlEvents:UIControlEventTouchUpInside];

         }

         return self;
    }

        - (void) addButton: (UIButton*) button withTitle: (NSString*) title andSize: (CGRect) size{

            button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
            button.frame = size;
            [button setTitle:title forState:UIControlStateNormal];
            button.userInteractionEnabled = YES;
            [self addSubview:button];
        }


        - (void)attemptLogin{

            NSString *user = usernameTxt.text;
            NSString *pass = passwordTxt.text;
            NSString *url = [[NSString alloc] initWithFormat:@"http://domain.com/login.php?username=%@&password=%@", user, pass];

            NSLog(@"%@", url);

        }

屏幕上没有打印。

提前致谢

Answer 1

问题主要是你正在分配一个新按钮，因此不能使用你的登录按钮，我在你的代码中评论了分配，这应该可以工作:

//旧版本代码已删除，请检查编辑

编辑

  - (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {

        self.layer.masksToBounds = YES;
        self.userInteractionEnabled = YES;

        login = [self addButtonWithTitle:@"Login" andSize:CGRectMake(85, 200, 90, 35)];
        [login addTarget:self action:@selector(attemptLogin)
        forControlEvents:UIControlEventTouchUpInside];

    }

    return self;
}

- (UIButton) addButtonWithTitle: (NSString*) title andSize: (CGRect) size{

    button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    button.frame = size;
    [button setTitle:title forState:UIControlStateNormal];
    button.userInteractionEnabled = YES;
    [self addSubview:button];
    return button;
}


- (void)attemptLogin{

    NSString *user = usernameTxt.text;
    NSString *pass = passwordTxt.text;
    NSString *url = [[NSString alloc] initWithFormat:@"http://domain.com/login.php?username=%@&password=%@", user, pass];

    NSLog(@"%@", url);

}