动态适配xib 存代码字体

.h文件

#import <UIKit/UIKit.h>
#import <objc/runtime.h>

NS_ASSUME_NONNULL_BEGIN
@interface UIFont (FontAdaptive)
@end

@interface UIButton (FontAdaptive)
@end

@interface UILabel (FontAdaptive)
@end

@interface UITextField (FontAdaptive)
@end


@interface UITextView (FontAdaptive)

@end
NS_ASSUME_NONNULL_END

.m 文件

#define Adaptive_coefficient [[UIScreen mainScreen]bounds].size.width/375.0f

@implementation UIFont (FontAdaptive)

+ (void)load {
    
    Method selfMethod = class_getClassMethod([self class], @selector(runtimeFitFont:));
    Method systenMethod = class_getClassMethod([self class], @selector(systemFontOfSize:));
    method_exchangeImplementations(selfMethod, systenMethod);
}

+ (UIFont *)runtimeFitFont:(CGFloat)fontSize {
    UIFont *fitFont = nil;
    //这里并不会造成递归调用,方法已经被交换
    fitFont = [UIFont runtimeFitFont:fontSize * Adaptive_coefficient];
    return fitFont;
}

@end


@implementation UIButton (FontAdaptive)

+ (void)load{
    Method imp = class_getInstanceMethod([self class], @selector(initWithCoder:));
    Method runtimeImp = class_getInstanceMethod([self class], @selector(runtimeInitWithCoder:));
    method_exchangeImplementations(imp, runtimeImp);
}

- (id)runtimeInitWithCoder:(NSCoder*)aDecode{
    [self runtimeInitWithCoder:aDecode];
    if (self) {
        
        //部分不像改变字体的 把tag值设置成2222跳过
        if(self.titleLabel.tag != 2222){
            CGFloat fontSize = self.titleLabel.font.pointSize;
            self.titleLabel.font = [UIFont systemFontOfSize:fontSize];
        }
    }
    return self;
}

@end


@implementation UILabel (FontAdaptive)

+ (void)load{
    Method imp = class_getInstanceMethod([self class], @selector(initWithCoder:));
    Method runtimeImp = class_getInstanceMethod([self class], @selector(runtimeInitWithCoder:));
    method_exchangeImplementations(imp, runtimeImp);
}

- (id)runtimeInitWithCoder:(NSCoder*)aDecode{
    [self runtimeInitWithCoder:aDecode];
    if (self) {
        //部分不像改变字体的 把tag值设置成2222跳过
        if(self.tag != 2222){
            CGFloat fontSize = self.font.pointSize;
            self.font = [UIFont systemFontOfSize:fontSize];
        }
    }
    return self;
}

@end

@implementation UITextField (FontAdaptive)

+ (void)load{
    Method imp = class_getInstanceMethod([self class], @selector(initWithCoder:));
    Method runtimeImp = class_getInstanceMethod([self class], @selector(runtimeInitWithCoder:));
    method_exchangeImplementations(imp, runtimeImp);
}

- (id)runtimeInitWithCoder:(NSCoder*)aDecode{
    [self runtimeInitWithCoder:aDecode];
    if (self) {
        //部分不像改变字体的 把tag值设置成2222跳过
        if(self.tag != 2222){
            CGFloat fontSize = self.font.pointSize;
            self.font = [UIFont systemFontOfSize:fontSize];
        }
    }
    return self;
}

@end

@implementation UITextView (FontAdaptive)

+ (void)load{
    Method imp = class_getInstanceMethod([self class], @selector(initWithCoder:));
    Method runtimeImp = class_getInstanceMethod([self class], @selector(runtimeInitWithCoder:));
    method_exchangeImplementations(imp, runtimeImp);
}

- (id)runtimeInitWithCoder:(NSCoder*)aDecode{
    [self runtimeInitWithCoder:aDecode];
    if (self) {
        //部分不像改变字体的 把tag值设置成2222跳过
        if(self.tag != 2222){
            CGFloat fontSize = self.font.pointSize;
            self.font = [UIFont systemFontOfSize:fontSize];
        }
    }
    return self;
}

@end