在选择器视图中为行实现的标题没有改变字体? [英] implemented title attributed for row in picker view did not change the font?

问题描述

我试图在我的选择器视图中更改标题的字体，但由于某种原因我不能.我可以更改标题的颜色，但字体保持不变?

I tried to change the font of the title in my picker view, but for some reason I could not. I can change the color of the title, but the font remains intact?

 func pickerView(_ pickerView: UIPickerView, attributedTitleForRow row: Int, forComponent component: Int) -> NSAttributedString? {
        let attrTitle = NSAttributedString(string: splitPickerSource[row], attributes: [NSFontAttributeName: UIFont(name: "Avenir-Heavy", size: 17.0)!, NSForegroundColorAttributeName: UIColor.darkGray])
        return attrTitle
    }

或者，我可以为 UIPickerView 实现 viewForRow 委托方法并从那里添加一个新标签.

Alternatively I can implement viewForRow delegate method for the UIPickerView and add a new label from there.

尝试打印attrTitle

Share Bill With{ NSColor = "UIExtendedSRGBColorSpace 0.117647 0.117647 0.117647 1"; NSFont = "<UICTFont: 0x7fb5f8d14080> font-family: \"Avenir-Heavy\"; font-weight: bold; font-style: normal; font-size: 14.00pt";

任何人都知道这种情况，为什么我不能修改字体attributedTitleForRow 委托方法?

Anyone has any idea about this situation and why can't I modify the font in attributedTitleForRow delegate method?

推荐答案

试试这个

//MARK: Setting picker select label size

    /**
     Called by Picker to To add customized text to fit size
     - parameter pickerView: The picker view requesting the data.
     - parameter row: Index of row
     - parameter component: component Index
     */

    func pickerView(_ pickerView: UIPickerView, viewForRow row: Int, forComponent component: Int, reusing view: UIView?) -> UIView {        
        let pickerLabel = UILabel() //get picker label that come

        pickerLabel.lineBreakMode = .byWordWrapping //Wrapping if needed

        pickerLabel.numberOfLines = 0; //So it comes to single line 

        pickerLabel.textColor = UIColor.white //setting colour 

        self.currentValue = NamesStringArray[row] //Array with Titles

        let data = NamesStringArray[row] //Taking Index Title

        let title = NSAttributedString(string: data, attributes: [NSAttributedStringKey.font : UIFont(name: "Avenir-Heavy", size: 40.0)!]) //here add attributes

        pickerLabel.attributedText = title //setting attributed text as title

        pickerLabel.sizeToFit() //Size to fit //If needed

        pickerLabel.adjustsFontSizeToFitWidth = true //if needed

        return pickerLabel //return value

    }

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