objective-c - NSGlyph的-glyphIsEncoded的替代品:

在移植一些古老的代码时，我遇到了一个奇怪的类，该类在OS X 10.4中被NSGlyph弃用了。搜寻了一段时间后，我想出了very few hits的确切含义，以及为什么它对框架中的if-else分支很重要。特别地，方法NSFont -glyphIsEncoded:似乎是某些分支的重要组成部分，对我来说，仅仅破坏它并继续前进以防万一某些东西破裂对我来说是可耻的。有人知道NSFont -glyphIsEncoded:的合适替代品吗？

if (glyph == 0xffff || ![font glyphIsEncoded:glyph]) {
    // Switch to getting it from the system font for "normal" keys
    // get the glyph from the layout manager (this normally will be the ascii value)
    glyph = [layoutManager glyphAtIndex: i];
font = [NSFont systemFontOfSize:[font pointSize]]; // use the system font
        //NSLog(@"Asking layout manager for glyph for %@, got %d", glyphName, glyph);
    }
    if (glyph != 0xffff && [font glyphIsEncoded:glyph]) {
        NSRect bounds = [font boundingRectForGlyph:glyph];
        [path moveToPoint: NSMakePoint(left, 0.0 - [font descender])];
        [path appendBezierPathWithGlyph: glyph inFont: font];
    left += [font advancementForGlyph: glyph].width;
        continue; // rendered a character
    } //etc...

最佳答案

根据documentation，

[font glyphIsEncoded:glyph]

可以替换为

glyph < [font numberOfGlyphs]