在iOS開發中,會經常碰到螢幕適配的問題,下面來說一下自己在專案開發中遇到的幾種螢幕適配的方式.

第一種:

利用寬高比,在不同的螢幕中來進行對控制元件的位置與控制元件的寬高進行等比例縮放.選定一個型號的螢幕的寬高為基準,進行等比例縮放.例如以iPhone6或者iPhone6s為基準.

其寬高分別是375與667.Iphone6ScaleWidth =  [UIScreen mainScreen].bounds.size.width/375; Iphone6ScaleHeight = [UIScreen mainScreen].bounds.size.height/667;

如果是iPhone6或者iPhone6s則Iphone6ScaleWidth

同時也可以在代理增加兩個屬性,寬高比例屬性,例如:

@interface AppDelegate : UIResponder <UIApplicationDelegate>
@property float autoSizeScaleX;
@property float autoSizeScaleY;

在- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    if(CurrentScreenHeight > 480){
        nowAppDelegate().autoSizeScaleX = CurrentScreenWidth/320.0;
        nowAppDelegate().autoSizeScaleY = CurrentScreenHeight/568.0;
    }else{
        nowAppDelegate().autoSizeScaleX = 1.0;其中nowAppDelegate

}

在專案對於控制元件的位置和尺寸乘以這兩個縮放比例.

第二種:

使用autoLayout進行螢幕適配.程式碼如下:

    UIView *headView = [[UIView alloc] init];
    headView.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:headView];
    headView.backgroundColor = [UIColor redColor];
    NSLayoutConstraint *headViewLeft = [NSLayoutConstraint constraintWithItem:headView attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeLeft multiplier:1.0 constant:0];
    NSLayoutConstraint *headViewTop = [NSLayoutConstraint constraintWithItem:headView attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeTop multiplier:1.0 constant:0];
    NSLayoutConstraint *headViewRight = [NSLayoutConstraint constraintWithItem:headView attribute:NSLayoutAttributeRight relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeRight multiplier:1.0 constant:0];
    NSLayoutConstraint *headViewHeight = [NSLayoutConstraint constraintWithItem:headView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:0 multiplier:0 constant:200];
    self.headHeightCons = headViewHeight;
    [self.view addConstraints:@[headViewTop,headViewLeft,headViewRight]];
    [headView addConstraint:headViewHeight];
    

    UIImage *imageLol = [UIImage imageNamed:@"lol"];
    UIImageView *imageViewLol = [[UIImageView alloc] initWithImage:imageLol];
    [headView addSubview:imageViewLol];
    imageViewLol.translatesAutoresizingMaskIntoConstraints = NO;
    [imageViewLol setContentMode:UIViewContentModeScaleAspectFill];

    
    NSLayoutConstraint *imageLolViewLeft = [NSLayoutConstraint constraintWithItem:imageViewLol attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:headView attribute:NSLayoutAttributeLeft multiplier:1.0 constant:0];
    NSLayoutConstraint *imageViewLolViewTop = [NSLayoutConstraint constraintWithItem:imageViewLol attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:headView attribute:NSLayoutAttributeTop multiplier:1.0 constant:0];
    NSLayoutConstraint *imageViewLolViewRight = [NSLayoutConstraint constraintWithItem:imageViewLol attribute:NSLayoutAttributeRight relatedBy:NSLayoutRelationEqual toItem:headView attribute:NSLayoutAttributeRight multiplier:1.0 constant:0];
    NSLayoutConstraint *imageViewLolViewBottom = [NSLayoutConstraint constraintWithItem:imageViewLol attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:headView attribute:NSLayoutAttributeBottom multiplier:1.0 constant:0];
    [headView addConstraints:@[imageLolViewLeft,imageViewLolViewTop,imageViewLolViewRight,imageViewLolViewBottom]];