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  • 两个算法,

    -(void)lifeViewAnimation

    {

        static int a = 0;

        static BOOL isAdd = NO;

        if (a >= 310) {

            a = a - 3;

            isAdd = NO;

        }else if(a == 0){

            a = a + 3;

            isAdd = YES;

        }else if (isAdd)

        {

            a = a + 3;

        }else if (!isAdd)

        {

            a = a - 3;

        }

        self.lifeView.frame = CGRectMake(a, self.lifeView.frame.origin.y, self.lifeView.frame.size.width, self.lifeView.frame.size.height);

    }

     

     

    -(void)lifeViewAnimation

    {

        static int a = 0;

        static int beforeA = 0;

        static BOOL isPlus = YES;

        

        if(a <= 0) {

            isPlus = YES;

        }

        if(a >= self.view.frame.size.width){

            isPlus = NO;

        }

        beforeA = a;

        

        if (isPlus) {

            a = a + 3;

        }else{

            a = a - 3;

        }

        if (a == beforeA+3) {

            isPlus = YES;

        }else{

            isPlus = NO;

        }

         self.lifeView.frame = CGRectMake(a, self.lifeView.frame.origin.y, self.lifeView.frame.size.width, self.lifeView.frame.size.height);

    }

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  • 原文地址:https://www.cnblogs.com/guligei/p/4218644.html
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