UIFont 与 CTFontRef 互相转换

UIFont - CTFontRef 转换

+ (UIFont *)uifontFromCTFontRef:(CTFontRef)ctFont {
    CGFloat pointSize = CTFontGetSize(ctFont);
    NSString *fontPostScriptName = (NSString *)CFBridgingRelease(CTFontCopyPostScriptName(ctFont));
    UIFont *fontFromCTFont = [UIFont fontWithName:fontPostScriptName size:pointSize];
    return fontFromCTFont;
}

+ (CTFontRef)ctFontRefFromUIFont:(UIFont *)font {
    CTFontRef ctfont = CTFontCreateWithName((__bridge CFStringRef)font.fontName, font.pointSize, NULL);
    return CFAutorelease(ctfont);
}

尝试用机器转 swift 却发现还不能直接用在 Swift 当中。

import Foundation
import Cocoa

func NSFont(fromCTFontRef ctFont: CTFont?) -> NSFont? {
    var pointSize: CGFloat? = nil
    if let ctFont = ctFont {
        pointSize = CTFontGetSize(ctFont)
    }
    let fontPostScriptName = CFBridgingRelease(CTFontCopyPostScriptName(ctFont!)) as? String
    let fontFromCTFont = NSFont(name: fontPostScriptName ?? "", size: pointSize ?? 0.0)
    return fontFromCTFont
}

func ctFontRef(from font: NSFont?) -> CTFont? {
    var ctfont: CTFont? = nil
    if let fontName = font?.fontName as CFString? {
        ctfont = CTFontCreateWithName(fontName, font?.pointSize ?? 0.0, nil)
    }
    return (CFAutorelease(ctfont) as! CTFont)
}