ios 自定义字体导入,及App默认字体修改

#import "UILabel+Labelfont.h" #import @implementation UILabel (Labelfont) /** *每个NSObject的子类都会调用下面这个方法 在这里将init方法进行替换，使用我们的新字体 *如果在程序中又特殊设置了字体 则特殊设置的字体不会受影响 但是不要在Label的init方法中设置字体 *从init和initWithFrame和nib文件的加载方法 都支持更换默认字体 */ +(void)load{ //只执行一次这个方法 static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ Class class = [self class]; // When swizzling a class method, use the following: // Class class = object_getClass((id)self); //替换三个方法 SEL originalSelector = @selector(init); SEL originalSelector2 = @selector(initWithFrame:); SEL originalSelector3 = @selector(awakeFromNib); SEL swizzledSelector = @selector(YHBaseInit); SEL swizzledSelector2 = @selector(YHBaseInitWithFrame:); SEL swizzledSelector3 = @selector(YHBaseAwakeFromNib); Method originalMethod = class_getInstanceMethod(class, originalSelector); Method originalMethod2 = class_getInstanceMethod(class, originalSelector2); Method originalMethod3 = class_getInstanceMethod(class, originalSelector3); Method swizzledMethod = class_getInstanceMethod(class, swizzledSelector); Method swizzledMethod2 = class_getInstanceMethod(class, swizzledSelector2); Method swizzledMethod3 = class_getInstanceMethod(class, swizzledSelector3); BOOL didAddMethod = class_addMethod(class, originalSelector, method_getImplementation(swizzledMethod), method_getTypeEncoding(swizzledMethod)); BOOL didAddMethod2 = class_addMethod(class, originalSelector2, method_getImplementation(swizzledMethod2), method_getTypeEncoding(swizzledMethod2)); BOOL didAddMethod3 = class_addMethod(class, originalSelector3, method_getImplementation(swizzledMethod3), method_getTypeEncoding(swizzledMethod3)); if (didAddMethod) { class_replaceMethod(class, swizzledSelector, method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod)); } else { method_exchangeImplementations(originalMethod, swizzledMethod); } if (didAddMethod2) { class_replaceMethod(class, swizzledSelector2, method_getImplementation(originalMethod2), method_getTypeEncoding(originalMethod2)); }else { method_exchangeImplementations(originalMethod2, swizzledMethod2); } if (didAddMethod3) { class_replaceMethod(class, swizzledSelector3, method_getImplementation(originalMethod3), method_getTypeEncoding(originalMethod3)); }else { method_exchangeImplementations(originalMethod3, swizzledMethod3); } }); } /** *在这些方法中将你的字体名字换进去 MarkerFelt-Thin */ - (instancetype)YHBaseInit { id __self = [self YHBaseInit]; UIFont * font = [UIFont fontWithName:@"Wawati SC" size:self.font.pointSize]; if (font) { self.font=font; } return __self; } -(instancetype)YHBaseInitWithFrame:(CGRect)rect{ id __self = [self YHBaseInitWithFrame:rect]; UIFont * font = [UIFont fontWithName:@"Wawati SC" size:self.font.pointSize]; if (font) { self.font=font; } return __self; } -(void)YHBaseAwakeFromNib{ [self YHBaseAwakeFromNib]; UIFont * font = [UIFont fontWithName:@"Wawati SC" size:self.font.pointSize]; if (font) { self.font=font; } } @end //以上为修改默认字体的文件代码 然后将文件引入工程就可以 正常使用label 那么字体就会变为默认的字体 下一篇我们将说导入自定义字体库