封装KBFont，适配字体

Shared/KBFont.m

@@ -0,0 +1,53 @@
+//
+//  KBFont.m
+//
+
+#import "KBFont.h"
+
+#if __OBJC__
+
+@implementation KBFont
+
++ (UIFont *)fontOfSize:(CGFloat)designSize weight:(UIFontWeight)weight {
+    // 以 375 设计稿为基准等比缩放（见 KBConfig.h 中的 KBFit）
+    CGFloat scaledSize = KBFit(designSize);
+    return [UIFont systemFontOfSize:scaledSize weight:weight];
+}
+
++ (UIFont *)regular:(CGFloat)designSize {
+    return [self fontOfSize:designSize weight:UIFontWeightRegular];
+}
+
++ (UIFont *)medium:(CGFloat)designSize {
+    return [self fontOfSize:designSize weight:UIFontWeightMedium];
+}
+
++ (UIFont *)semibold:(CGFloat)designSize {
+    return [self fontOfSize:designSize weight:UIFontWeightSemibold];
+}
+
++ (UIFont *)bold:(CGFloat)designSize {
+    return [self fontOfSize:designSize weight:UIFontWeightBold];
+}
+
+#pragma mark - 语义字体（可按设计自由修改数值）
+
++ (UIFont *)titleFont {
+    // 例如：18pt，半粗体
+    return [self fontOfSize:18.0 weight:UIFontWeightSemibold];
+}
+
++ (UIFont *)bodyFont {
+    // 例如：14pt，常规
+    return [self regular:14.0];
+}
+
++ (UIFont *)captionFont {
+    // 例如：12pt，常规
+    return [self regular:12.0];
+}
+
+@end
+
+#endif
+