xcode 不值钱的动画UIImageView

秒速五厘米 2021-12-24 07:21 228阅读 0赞

了解 animateWithDuration方法 制作动画变得不值钱

代码创建一个UIImageView 后加入self.view 容器中

调用点击屏幕touchesBegan 方法执行动画

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#import "ViewController.h"
    
    @interface ViewController ()
    @property(nonatomic,weak)UIImageView * imgview;
    
    @end
    
    @implementation ViewController
    
    - (void)viewDidLoad {
        [super viewDidLoad];
        CGFloat cgW=self.view.bounds.size.width;
        CGFloat imgW=174;
        CGFloat imgH=272;
        CGFloat cgY=(cgW-imgW)*0.5;
        
        UIImageView * imgType=[[UIImageView alloc]init];
        imgType.frame=CGRectMake(cgY, cgY, imgW, imgH);
        imgType.image=[UIImage imageNamed:@"timg"];
        imgType.contentMode=UIViewContentModeScaleAspectFill;
        
        self.imgview=imgType;
        self.imgview.alpha=1;//设置透明度
        [self.view addSubview:self.imgview];
      
    }
    -(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
    
        //动画1
    //    [self animationPlay1];
        //动画2
    //    [self animationPlay2];
        //动画3
    //    [self animationPlay3];
        //动画4
        [self animationPlay4];
    }
    
    /**
     动画一
     向下滑动
     并且消失
     */
    -(void)animationPlay1{
        /**
         animateWithDuration:执行动画的时间
         animations:执行的代码
         */
        [UIView animateWithDuration:2.0 animations:^{
            CGRect temp=self.imgview.frame;
            temp.origin.y+=200;
            self.imgview.alpha=0.1;//设置透明度
            self.imgview.frame=temp;
        }];
    }
    /**
     向下滑动然后回去
     */
    -(void)animationPlay2{
        /**
         animateWithDuration:执行动画的时间
         animations:执行的代码
         completion:执行完代码的回调函数
         */
    [UIView animateWithDuration:1.5 animations:^{
        CGRect temp=self.imgview.frame;
        temp.origin.y+=100;
        self.imgview.frame=temp;
    
    
    } completion:^(BOOL finished) {
        CGRect temp=self.imgview.frame;
        temp.origin.y-=100;
        self.imgview.frame=temp;
    
    }];
    }
    /**
     向下滑动然后回去延迟1秒钟
     */
    -(void)animationPlay3{
        /**
         animateWithDuration: 动画时间
         delay:延迟时间
         options:kNilOptions 这个一般设置为kNilOptions 也就是0
         animations:要执行的动画代码
         completion:回调函数
         */
    [UIView animateWithDuration:1.5 delay:1.0 options:kNilOptions animations:^{
        CGRect temp=self.imgview.frame;
        temp.origin.y+=100;
        self.imgview.frame=temp;
    } completion:^(BOOL finished) {
        CGRect temp=self.imgview.frame;
        temp.origin.y-=100;
        self.imgview.frame=temp;
    }];
    
    }
    /**
     放大图片
     然后缩放回去
     */
    -(void) animationPlay4{
        CGFloat cgW=self.view.bounds.size.width;
        //    CGFloat cgH=self.view.bounds.size.height;
        
        CGFloat imgW=self.imgview.bounds.size.width;
        CGFloat cgY=(cgW-imgW)*0.5;
        [UIView animateWithDuration:1.5 animations:^{
            CGRect temp=self.imgview.frame;
            temp=CGRectMake(0, cgY, self.view.bounds.size.width, self.view.frame.size.height-cgY);
            self.imgview.frame=temp;
            self.imgview.alpha=0.0;//设置透明度
           
        } completion:^(BOOL finished) {
           [UIView animateWithDuration:2.0 animations:^{
               CGFloat cgW=self.view.bounds.size.width;
               CGFloat imgW=174;
               CGFloat imgH=272;
               CGFloat cgY=(cgW-imgW)*0.5;
    //           CGRect temp=self.imgview.frame;
    //           temp=CGRectMake(cgY, cgY, imgW, imgH);
               self.imgview.alpha=1.0;//设置透明度
               self.imgview.frame=CGRectMake(cgY, cgY, imgW, imgH);
           }];
        }];
    
        
    }
    
    @end

转载于:https://www.cnblogs.com/fleas/p/5561551.html

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