适配iphone和iPad

一、分别开发iphone和iPad版本
二、兼容开发iphone和ipad
1、General -> Deployment info -> Devices ->Universal

image.png

xib：
2、选中要适配的xib，例view.xib
3、file -> duplicate,将文件命名为view_ipad.xib
4、右键view_ipad.xib,open as -> source code， 找到targetrRuntime,将其修改为 targetRuntime="iOS.CocoaTouch.iPad"
5、为UINib创建分类 UINib+Adapter

@interface UINib (Adapter)

+ (UINib *)nibAdapter:(NSString *)name bundle:(nullable NSBundle *)bundleOrNil;

@end

#import "UINib+Adapter.h"

@implementation UINib (Adapter)

+ (UINib *)nibAdapter:(NSString *)name bundle:(nullable NSBundle *)bundleOrNil{
    UINib *nib;
    if((UI_USER_INTERFACE_IDIOM()==UIUserInterfaceIdiomPad)) {
        NSString *ipad = [name stringByAppendingString:@"_ipad"];
        nib = [UINib nibWithNibName:ipad bundle:bundleOrNil];
        
    }else{
        nib = [UINib nibWithNibName:name bundle:bundleOrNil];
        
    }
    return nib;
}


@end

调用方法nibWithNibName: bundle:替换成nibAdapter: bundle:

UIStoryboard
前四步类似
5、同样建立分类

@interface UIStoryboard (Adapter)

+ (UIStoryboard*_Nullable)storyboardAdapter:(nonnull NSString*)name bundle:(nullable NSBundle*)storyboardBundleOrNil;

@end

#import "UIStoryboard+Adapter.h"

@implementation UIStoryboard (Adapter)

+ (UIStoryboard*)storyboardAdapter:(NSString*)name bundle:(nullable NSBundle*)storyboardBundleOrNil{
    UIStoryboard *storyBoard;
    if((UI_USER_INTERFACE_IDIOM()==UIUserInterfaceIdiomPad)) {
        NSString *ipad = [name stringByAppendingString:@"_ipad"];
        storyBoard = [UIStoryboard storyboardWithName:ipad bundle:storyboardBundleOrNil];
        
    }else{
        storyBoard = [UIStoryboard storyboardWithName:name bundle:storyboardBundleOrNil];
        
    }
    return storyBoard;
    
}


@end

调用方法storyboardWithName:bundle:替换成storyboardAdapter: bundle: