Question

我有一个UIImageView，它在视图加载时移动。它首先进入+100，然后将BOOL设置为已完成。

当BOOL设置为完成时，它将执行另一个动画，将UIImageView放回原始位置。当我的UIImageView回到它的原始位置时，它应该再次开始整个事情。这种重复应永远持续下去！我怎么能这样做？

这是我的代码：

[UIView animateWithDuration:0.5
     animations:^

     {
         //move up
         Person.center = CGPointMake(Person.center.x, Person.center.y +100);

     }
                     completion:^(BOOL completed)
     {
         if (completed)
         {
             //completed move up..now move down
             [UIView animateWithDuration:0.5
                              animations:^
              {
                  Person.center = CGPointMake(Person.center.x, Person.center.y -100);
              }

              ];
         }
     }];

Answer 1

试试这段代码......

-(void)repeatForever
{
[UIView animateWithDuration:0.5
                 animations:^

 {
     //move up
     Person.center = CGPointMake(Person.center.x, Person.center.y +100);

 }
                 completion:^(BOOL completed)
 {
     if (completed)
     {
         //completed move up..now move down
         [UIView animateWithDuration:0.5 animations:^{

             Person.center = CGPointMake(Person.center.x, Person.center.y -100);

         } completion:^(BOOL finished) {
             [self repeatForever];
         }];
     }
 }];

}

我该如何重复这个动画？

1 个答案: