iPhone/iPad UIButton TitleLabel text not appearing

问题:

I created a grid of buttons. The following code creates the buttons and displays them, but there is no text on the button. Is there a setting I am missing? (Obj-C replies are fine, I'm bi-lingual)

RectangleF frame = new RectangleF (X + 3, Y + 3, cellWidth - 2, cellHeight - 2);
UIButton button = new UIButton (frame);
button.TitleLabel.Text = "Baha'i";
button.TitleLabel.Font = UIFont.FromName ("Helvetica-Bold", 15);
button.TitleLabel.TextColor = UIColor.Black;
button.TitleLabel.Frame = frame;
button.BackgroundColor = UIColor.FromWhiteAlpha(.5f,.5f);
this.AddSubview (button);

回答1:

I think you want setTitle: forState:

[button setTitle:@"Baha'i" forState:UIControlStateNormal]

回答2:

A UIButton inherits from UIView, so another way to add text and images, is to add subview. Example:

// My Image
UIImage *buttonImage = [UIImage imageNamed:@"myImage.png"];
UIImageView *buttonImageView = [[[UIImageView alloc] 
    initWithFrame:CGRectMake(0, 0, 
    buttonImage.size.width,buttonImage.size.height)] autorelease];
[buttonImageView setImage:buttonImage];

// My Label
UILabel* titleLabel = [[[UILabel alloc] 
    initWithFrame:CGRectMake(0, 0, 
    buttonImage.size.width, buttonImage.size.height)] autorelease];
titleLabel.text = @"My Text";
titleLabel.font = [UIFont fontWithName:@"Helvetica-Bold" size: 11.0];
titleLabel.textColor = [UIColor blackColor];
titleLabel.backgroundColor = [UIColor clearColor];
titleLabel.textAlignment = UITextAlignmentCenter;

// Create Button with Image and Label
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button addSubview:buttonImageView];
[button addSubview:titleLabel];

回答3:

UIButton *  selectCountryBtn =  [[UIButton alloc]initWithFrame:CGRectMake(0, 0, 100, 100)];  

[selectCountryBtn setTitle:@"My Title" forState:UIControlStateNormal];

Here, I have create sample programmatically button, and then set the title for its Normal Control state, You can use your own button object for set the title string, additionally you can also set title text for another control states by change UIControlStateNormal to another required states.

回答4:

For swift Developers-

button.setTitle("Your button Name", for: .normal)

回答5:

In my case (Swift 4) it was the following:

btnLogin.setTitle("Welcome, " + var_name, for: [])

回答6:

  self.Button_name.titleLabel.text = @"Your title name";