本人刚刚开始学习ios开发，老师要求实现一个刷牙APP的UI界面，遇上了几个问题，卡了两天了。。
我制作了一个UI界面如图图片说明主要遇上两个问题：
①我希望首次加载粉色女孩界面时，星星上的数字能显示daysStar数组里的Int数字。但在viewDidLoad()中写的button.titleLabel?.text=String(daysStar[1])语句并不能实现这个功能，请问原因是什么呢？(daysStar已经初始化为1，但真机运行时所有数字都初始显示0)
②我在storyboard中给三行按钮的titlelabel都写了一个0，每次点击右上角的刷牙按钮时，星星按钮的label数字会递增，但点击一下星星按钮，数字就会显示0。我尝试过不写0，但是不写0的话，点击按钮不会出现数字，也尝试过把星星用View叠加到粉色矩形上，但按钮的可用性会差很多。这个问题怎么解决呢?（星星按钮是使用了粉色为底的五角星图片）
代码有什么写的不好的地方，也欢迎大家指出呀！
MM界面代码如下：

import UIKit

class mmViewController: UIViewController {

var firstWeekday:Int?;
var daysStar = [Int](repeating: 1, count: 21)


override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view.
    // Initialize weekday labels
    // print(daysStar)
    // var daysStar = [Int](repeating: 1, count: 21)

            // Load the weekdays' label
    switch firstWeekday {
        case 1:
            firstLabel.text="周一"
            secondLabel.text="周二"
            thirdLabel.text="周三"
            fourthLabel.text="周四"
            fifthLabel.text="周五"
            sixthLabel.text="周六"
            seventhLabel.text="周日"
        case 2:
            firstLabel.text="周二"
            secondLabel.text="周三"
            thirdLabel.text="周四"
            fourthLabel.text="周五"
            fifthLabel.text="周六"
            sixthLabel.text="周日"
            seventhLabel.text="周一"
        case 3:
            firstLabel.text="周三"
            secondLabel.text="周四"
            thirdLabel.text="周五"
            fourthLabel.text="周六"
            fifthLabel.text="周日"
            sixthLabel.text="周一"
            seventhLabel.text="周二"
        case 4:
            firstLabel.text="周四"
            secondLabel.text="周五"
            thirdLabel.text="周六"
            fourthLabel.text="周日"
            fifthLabel.text="周一"
            sixthLabel.text="周二"
            seventhLabel.text="周三"
        case 5:
            firstLabel.text="周五"
            secondLabel.text="周六"
            thirdLabel.text="周日"
            fourthLabel.text="周一"
            fifthLabel.text="周二"
            sixthLabel.text="周三"
            seventhLabel.text="周四"
        case 6:
            firstLabel.text="周六"
            secondLabel.text="周日"
            thirdLabel.text="周一"
            fourthLabel.text="周二"
            fifthLabel.text="周三"
            sixthLabel.text="周四"
            seventhLabel.text="周五"
        case 7:
            firstLabel.text="周日"
            secondLabel.text="周一"
            thirdLabel.text="周二"
            fourthLabel.text="周三"
            fifthLabel.text="周四"
            sixthLabel.text="周五"
            seventhLabel.text="周六"
        default :
            firstLabel.text="周一"
            secondLabel.text="周二"
            thirdLabel.text="周三"
            fourthLabel.text="周四"
            fifthLabel.text="周五"
            sixthLabel.text="周六"
            seventhLabel.text="周日"
    }

    // Initialize each day's stars
    _3but.titleLabel?.text=String(daysStar[0])
    _12but.titleLabel?.text=String(daysStar[1])
    _13but.titleLabel?.text=String(daysStar[2])
    _14but.titleLabel?.text=String(daysStar[3])
    _15but.titleLabel?.text=String(daysStar[4])
    _16but.titleLabel?.text=String(daysStar[5])
    _17but.titleLabel?.text=String(daysStar[6])
    _21but.titleLabel?.text=String(daysStar[7])
    _22but.titleLabel?.text=String(daysStar[8])
    _23but.titleLabel?.text=String(daysStar[9])
    _24but.titleLabel?.text=String(daysStar[10])
    _25but.titleLabel?.text=String(daysStar[11])
    _26but.titleLabel?.text=String(daysStar[12])
    _27but.titleLabel?.text=String(daysStar[13])
    _31but.titleLabel?.text=String(daysStar[14])
    _32but.titleLabel?.text=String(daysStar[15])
    _33but.titleLabel?.text=String(daysStar[16])
    _34but.titleLabel?.text=String(daysStar[17])
    _35but.titleLabel?.text=String(daysStar[18])
    _36but.titleLabel?.text=String(daysStar[19])
    _37but.titleLabel?.text=String(daysStar[20])

}


@IBOutlet weak var firstLabel: UILabel!
@IBOutlet weak var secondLabel: UILabel!
@IBOutlet weak var thirdLabel: UILabel!
@IBOutlet weak var fourthLabel: UILabel!
@IBOutlet weak var fifthLabel: UILabel!
@IBOutlet weak var sixthLabel: UILabel!
@IBOutlet weak var seventhLabel: UILabel!
@IBAction func brush_but(_ sender: Any) {
    if (getCurrentHour()>=5&&getCurrentHour()<=11)||(getCurrentHour()>=19&&getCurrentHour()<=23) {
        daysStar[0]+=4
    }
    else{
        daysStar[0]+=1
    }
    _3but.titleLabel?.text=String(daysStar[0])
}
@IBOutlet weak var _3but: UIButton!
@IBAction func _3but(_ sender: Any) {
}

@IBOutlet weak var _12but: UIButton!
@IBAction func _12but(_ sender: Any) {
}
@IBOutlet weak var _13but: UIButton!
@IBAction func _13but(_ sender: Any) {
}
@IBOutlet weak var _14but: UIButton!
@IBAction func _14but(_ sender: Any) {
}
@IBOutlet weak var _15but: UIButton!
@IBAction func _15but(_ sender: Any) {
}
@IBOutlet weak var _16but: UIButton!
@IBAction func _16but(_ sender: Any) {
}
@IBOutlet weak var _17but: UIButton!
@IBAction func _17but(_ sender: Any) {
}
@IBOutlet weak var _21but: UIButton!
@IBAction func _21but(_ sender: Any) {
}
@IBOutlet weak var _22but: UIButton!
@IBAction func _22but(_ sender: Any) {
}
@IBOutlet weak var _23but: UIButton!
@IBAction func _23but(_ sender: Any) {
}
@IBOutlet weak var _24but: UIButton!
@IBAction func _24but(_ sender: Any) {
}
@IBOutlet weak var _25but: UIButton!
@IBAction func _25but(_ sender: Any) {
}
@IBOutlet weak var _26but: UIButton!
@IBAction func _26but(_ sender: Any) {
}
@IBOutlet weak var _27but: UIButton!
@IBAction func _27but(_ sender: Any) {
}
@IBOutlet weak var _31but: UIButton!
@IBAction func _31but(_ sender: Any) {
}
@IBOutlet weak var _32but: UIButton!
@IBAction func _32but(_ sender: Any) {
}
@IBOutlet weak var _33but: UIButton!
@IBAction func _33but(_ sender: Any) {
}
@IBOutlet weak var _34but: UIButton!
@IBAction func _34but(_ sender: Any) {
}
@IBOutlet weak var _35but: UIButton!
@IBAction func _35but(_ sender: Any) {
}
@IBOutlet weak var _36but: UIButton!
@IBAction func _36but(_ sender: Any) {
}
@IBOutlet weak var _37but: UIButton!
@IBAction func _37but(_ sender: Any) {
}

func getCurrentHour() -> Int {

    var timers: [Int] = []

    let calendar: Calendar = Calendar(identifier: .gregorian)
    var comps: DateComponents = DateComponents()
    comps = calendar.dateComponents([.year,.month,.day, .weekday, .hour, .minute,.second], from: Date())
    timers.append(comps.hour!)

    return timers[0];
}
/*
// MARK: - Navigation

// In a storyboard-based application, you will often want to do a little preparation before navigation
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
    // Get the new view controller using segue.destination.
    // Pass the selected object to the new view controller.
}
*/

}

Mac下在xcode里编译opencv出现下面错误请问怎么回事？

ZoeGreenn

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