我是一个初学iOS的程序员，尝试开发一个iOS应用程序。我有几个按钮，我放在应用程序的主页上，就像在图片中。

请看红色的圆圈。2图片和标题之间没有空格（填充/插入）。
实际上，我已经用这个代码设置了图片和标题的插入。2但是，它没有给出任何不同的结果。

buttonDoctor.titleLabel?.numberOfLines = 2
    buttonDoctor.titleLabel?.lineBreakMode = .byWordWrapping
    buttonMedical.titleLabel?.numberOfLines = 2
    buttonMedical.titleLabel?.lineBreakMode = .byWordWrapping
    buttonQuestion.titleLabel?.numberOfLines = 2
    buttonQuestion.titleLabel?.lineBreakMode = .byWordWrapping
    buttonLocation.titleLabel?.numberOfLines = 2
    buttonLocation.titleLabel?.lineBreakMode = .byWordWrapping
    buttonPromotion.titleLabel?.numberOfLines = 2
    buttonPromotion.titleLabel?.lineBreakMode = .byWordWrapping
    buttonDoctor.image(for: .normal)
    buttonMedical.image(for: .normal)
    buttonQuestion.image(for: .normal)
    buttonLocation.image(for: .normal)
    buttonPromotion.image(for: .normal)
    //buttonDoctor.titleLabel?.adjustsFontSizeToFitWidth = true
    //buttonPromotion.titleLabel?.adjustsFontSizeToFitWidth = true
    //buttonLocation.titleLabel?.adjustsFontSizeToFitWidth = true
    //buttonQuestion.titleLabel?.adjustsFontSizeToFitWidth = true
    //buttonMedical.titleLabel?.adjustsFontSizeToFitWidth = true


    let btnimg = try? UIImage(named: "doctorschedule.png")
    var newimg = imageResize(image: btnimg!!, scaledTo: CGSize(width: 36, height: 36))
    buttonDoctor.setImage(newimg, for: .normal)
    buttonDoctor.contentMode = .scaleAspectFit
    buttonDoctor.imageEdgeInsets = UIEdgeInsetsMake(5, 3, 0, 5)
    buttonDoctor.titleEdgeInsets = UIEdgeInsetsMake(5, 3, 0, 0)

    let btnimg2 = try? UIImage(named: "medicalcheck.png")
    var newimg2 = imageResize(image: btnimg2!!, scaledTo: CGSize(width: 36, height: 36))
    buttonMedical.setImage(newimg2, for: .normal)
    buttonMedical.contentMode = .scaleAspectFit
    buttonMedical.imageEdgeInsets = UIEdgeInsetsMake(5, 3, 0, 5)
    buttonMedical.titleEdgeInsets = UIEdgeInsetsMake(5, 3, 0, 0)

    let btnimg3 = try? UIImage(named: "survey.png")
    var newimg3 = imageResize(image: btnimg3!!, scaledTo: CGSize(width: 36, height: 36))
    buttonQuestion.setImage(newimg3, for: .normal)
    buttonQuestion.contentMode = .scaleAspectFit
    buttonQuestion.imageEdgeInsets = UIEdgeInsetsMake(5, 3, 0, 5)
    buttonQuestion.titleEdgeInsets = UIEdgeInsetsMake(5, 3, 0, 0)

    let btnimg4 = try? UIImage(named: "location.png")
    var newimg4 = imageResize(image: btnimg4!!, scaledTo: CGSize(width: 36, height: 36))
    buttonLocation.setImage(newimg4, for: .normal)
    buttonLocation.contentMode = .scaleAspectFit
    buttonLocation.imageEdgeInsets = UIEdgeInsetsMake(5, 3, 0, 5)
    buttonLocation.titleEdgeInsets = UIEdgeInsetsMake(5, 3, 0, 0)

    let btnimg5 = try? UIImage(named: "promotion.png")
    var newimg5 = imageResize(image: btnimg5!!, scaledTo: CGSize(width: 36, height: 36))
    buttonPromotion.setImage(newimg5, for: .normal)
    buttonPromotion.contentMode = .scaleAspectFit
    buttonPromotion.imageEdgeInsets = UIEdgeInsetsMake(5, 3, 0, 5)
    buttonPromotion.titleEdgeInsets = UIEdgeInsetsMake(5, 3, 0, 0)

我已经尝试了几个值的插入，但它没有给不同的结果。我做了什么错误的代码？
请有人好心地帮助我如何解决这个问题。谢谢
注：我还有一个问题，我想在首页的顶部放一个图像标志（见橙色圆圈），但我不知道该怎么做。因为导航栏中没有插入图像的属性。仅供参考，它只是我从故事板中放入的UIViewController中的常规导航栏（不是UINavigationController）。如果你不介意的话，请给出一些建议。
注意：圆圈中的所有东西都是普通的UIBUTTON，而不是UIImage和UILabel或UIbutton。请看我的代码。