接手公司项目，在里面看见了屏幕适配的方法，感觉很方便，缺点就是只支持竖屏。

1.首先在工程里面创建一个pch文件。这个百度一下就行，网址http://www.jianshu.com/p/67ce72c4ad6c。
2.再来到appDelegate.h里面生成两个属性。

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;

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

@end

3.来到appDelegate.m里面，先将获得屏幕的宽高写个宏定义，再在- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions方法里面添加下面代码：

#define ScreenHeight [[UIScreen mainScreen] bounds].size.height
#define ScreenWidth [[UIScreen mainScreen] bounds].size.width
@interface AppDelegate ()

@end

@implementation AppDelegate


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    // Override point for customization after application launch.
    
    AppDelegate *myDelegate = [[UIApplication sharedApplication] delegate];
    
    if(ScreenHeight > 480 && ScreenHeight<1024){
        myDelegate.autoSizeScaleX = ScreenWidth/320;
        myDelegate.autoSizeScaleY = ScreenHeight/568;
    }else if(ScreenHeight >= 1024){
        myDelegate.autoSizeScaleX = ScreenWidth/320;
        myDelegate.autoSizeScaleY = ScreenHeight*1.333333/568;
    }else
    {
        myDelegate.autoSizeScaleX = 1.0;
        myDelegate.autoSizeScaleY = 1.0;
    }

    
    
    return YES;
}

4.在pch文件里面添加AppDelegate的头文件

#ifndef PrefixHeader_pch
#define PrefixHeader_pch

#import "AppDelegate.h"

#endif /* PrefixHeader_pch */

5.创建一个Header file文件如下图

424948DD-28F6-4701-B2FB-EB5BC57D2FDD.png

6.在Header file文件里面添加下面代码

#ifndef SetFrame_h
#define SetFrame_h
CG_INLINE CGRect CGRectMakes(CGFloat x, CGFloat y, CGFloat width, CGFloat height)
{
    AppDelegate *myDelegate = [[UIApplication sharedApplication] delegate];
    CGRect rect;
    rect.origin.x    = x * myDelegate.autoSizeScaleX;
    rect.origin.y    = y * myDelegate.autoSizeScaleY;
    rect.size.width  = width * myDelegate.autoSizeScaleX;
    rect.size.height = height * myDelegate.autoSizeScaleY;
    return rect;
}

CG_INLINE CGSize CGSizeMakes(CGFloat width, CGFloat height)
{
    AppDelegate *myDelegate = [[UIApplication sharedApplication] delegate];
    CGSize rect;
    rect.width  = width * myDelegate.autoSizeScaleX;
    rect.height = height * myDelegate.autoSizeScaleY;
    return rect;
}

CG_INLINE CGPoint CGPointMakes(CGFloat width, CGFloat height){
    AppDelegate *myDelegate = [[UIApplication sharedApplication] delegate];
    CGPoint rect;
    rect.x  = width * myDelegate.autoSizeScaleX;
    rect.y = height * myDelegate.autoSizeScaleY;
    return rect;
}

CG_INLINE CGFloat TableCellHeight(CGFloat height){
    AppDelegate *myDelegate = [[UIApplication sharedApplication] delegate];
    CGFloat newHeight;
    newHeight  = height * myDelegate.autoSizeScaleY;
    return newHeight;
}


#endif /* SetFrame_h */

7.在pch文件里面添加Header file的头文件

#ifndef PrefixHeader_pch
#define PrefixHeader_pch

#import "AppDelegate.h"
#import "SetFrame.h"

#endif /* PrefixHeader_pch */

这样就可以使用了，有4个方法可以调用，分别是CGRectMakes(CGFloat x, CGFloat y, CGFloat width, CGFloat height)、CGSizeMakes(CGFloat width, CGFloat height)、CGPointMakes(CGFloat width, CGFloat height)和TableCellHeight(CGFloat height)。使用的时候直接将系统的修改成这是个方法，比如创建一个label，直接将系统的CGRectMake改为CGRectMakes就可以了。

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMakes(10, 10,10 , 10)];
    label.backgroundColor = [UIColor redColor];
    [self.view addSubview:label];      
}