iOS 简单实现等比例适配

0.在appdelegate中声明两个变量

@property (nonatomic , assign)float autoSizeScaleX;
@property (nonatomic , assign)float autoSizeScaleY;

1.在appdelegate.m中初始化这两个变量

/// 获取到delegate
    AppDelegate *delegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
/// 这里是基于苹果6sp的尺寸为标准,其他屏幕按比例缩放
    if (kScreenHeight > 苹果6sp){
        delegate.autoSizeScaleX = 1;
        delegate.autoSizeScaleY = 1;
    } else {
        delegate.autoSizeScaleX = kScreenWidth / 375;
        delegate.autoSizeScaleY = kScreenHeight / 667;
    }

2.在pch中 获取到appdelegate

#define ZCAppDelegate ((AppDelegate *)[UIApplication sharedApplication].delegate)

3.做成你自己的宏,调用的时候直接adaptX(num)或者adaptY(num)

#define adaptX(num) num *ZCAppDelegate.autoSizeScaleX
#define adaptY(num) num *ZCAppDelegate.autoSizeScaleY

4.最后别忘了把appdelegate包含在pch文件里