我不会动画一个像箭头一样的视图,我想让它从左到右,从左到右动画.
下面的代码不起作用,我猜想我需要一个路径,但是不知道如何在UIView块动画中这样做.
[UIView animateWithDuration:.5 delay:0 options:UIViewAnimationOptionRepeat animations:^{
controller.view.frame = frame1;
controller.view.frame = frame2;
} completion:^(BOOL finished) {
}];
解决方法
您可以使用UIViewAnimationOptionAutoreverse选项,尝试以下代码：
UIView * testView = [[UIView alloc] initWithFrame:CGRectMake(20.0f,100.0f,300.0f,200.0f)];
[testView setBackgroundColor:[UIColor blueColor]];
[self.view addSubview:testView];
[UIView animateWithDuration:0.3f
delay:0.0f
options:UIViewAnimationOptionRepeat | UIViewAnimationOptionAutoreverse
animations:^{
[testView setFrame:CGRectMake(0.0f,200.0f)];
}
completion:nil];
[testView release];
它将重复从右到左,从左到右,顺利地移动.
