工作问题解决记录

1.Excel截取特定字符串前面的字符串：

=LEFT(A2,FIND("=",A2)-1)

2.Swift使用compactMap创建Button：

        _ = buttons.enumerated().compactMap({ (index, value) -> UIButton in
            let button = UIButton()
            self.addSubview(button)
            button.snp.makeConstraints({ (make) in
                make.width.equalTo(btnWidth)
                make.height.equalTo(45)
                make.top.equalTo(self.centerView.snp.bottom).offset(23)
                make.left.equalTo(self.centerView.snp.left).offset(CGFloat(index)*(btnWidth + 6))
            })
            button.setTitle(buttons[index].title, for: .normal)
            button.titleLabel?.font = UIFont.systemFont(ofSize: 18)
            button.layer.cornerRadius = 2.0
            button.layer.masksToBounds = true
            if buttons[index].isRed {
                button.setTitleColor(UIColor.white, for: .normal)
                button.backgroundColor = UIColor(hexString: "C23232")
            }else {
                button.setTitleColor(UIColor(hexString: "D5D5D5"), for: .normal)
                button.backgroundColor = UIColor.clear
                button.layer.borderWidth = 1.0
                button.layer.borderColor = UIColor(hexString: "D5D5D5").cgColor
            }
            responseDic[button] = buttons[index].action
            button.addTarget(self, action: #selector(buttonClick(btn:)), for: .touchUpInside)
            return button
        })

3.导入FrameWork，不能调用方法：

屏幕快照 2018-11-27 下午4.51.32.png

4.删除数组重复元素：

 let array: [String] = ["1011", "2022", "333", "444", "1011", "444"]
 print("array = ", array)
 // 删除数组重复元素
let result = Array(Set(array))
print("result = ", result)
        

5.报错:

A String substring is not Range<Int>, it's Range<String.index>

range可用于数组截取

let array = ["a", "b", "c", "d", "e"]
let a = array[2...3]  //["c", "d"]
let b = array[2..<3]  //["b"]

当然String不可以这样截取

6.设置Label字间距:

[attributedStr addAttribute:NSKernAttributeName value:@(10) range:NSMakeRange(0, attributedStr.length)];

以后这类的文章就这样设置标题咯~~~嘻嘻嘻