屏幕适配

最新推荐文章于 2025-07-23 11:21:50 发布

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#屏幕自动适配

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本文介绍了一种在iOS应用中实现界面元素自适应不同屏幕尺寸的方法。通过在AppDelegate中设置autoSizeScaleX和autoSizeScaleY属性，可以计算出相对于标准尺寸的缩放比例，并在ViewController中使用自定义的CGRectMake1函数来创建适配当前设备屏幕尺寸的frame。

AppDelegate.h

#import <UIKit/UIKit.h>
@interface AppDelegate : UIResponder <UIApplicationDelegate>
@property (strong, nonatomic) UIWindow *window;
@property float autoSizeScaleX;
@property float autoSizeScaleY;
@end

AppDelegate.m

#import "AppDelegate.h"
#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 {

    AppDelegate *myDelegate = [[UIApplication sharedApplication] delegate];
    if (ScreenHeight > 568 || ScreenHeight < 568) {
        myDelegate.autoSizeScaleX = ScreenWidth / 320;
        myDelegate.autoSizeScaleY = ScreenWidth / 568;
    } else {
        myDelegate.autoSizeScaleX = 1.0;
        myDelegate.autoSizeScaleY = 1.0;
    }
    return YES;
}

ViewController.m

#import "ViewController.h"
#import "AppDelegate.h"
@interface ViewController ()

@end
@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    UIImageView *imageview = [[UIImageView alloc] initWithFrame:CGRectMake1(100, 100, 50, 50)];

    imageview.backgroundColor = [UIColor redColor];
    [self.view addSubview:imageview];
}

CG_INLINE CGRect  CGRectMake1(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;

    if (ScreenHeight == 480) {
        rect.origin.x = x * myDelegate.autoSizeScaleY;
        rect.origin.y = y * myDelegate.autoSizeScaleY;
        rect.size.width = width * myDelegate.autoSizeScaleY;
        rect.size.height = height * myDelegate.autoSizeScaleY;
    }
    return rect;
}