我在添加案例开关的代码时遇到了问题,或者只用一个按钮就可以了,这样当我按下它时它可以旋转图像,而当我再次点击它时,它应该在其他方向旋转。
答案 0 :(得分:0)
试试这个,
此处yourImage是要旋转的图像视图
- (IBAction)rotateImage:(UIButton *)sender // your button action method
{
if (!sender.selected)
{
[sender setSelected:YES];
[UIView animateKeyframesWithDuration:2.0
delay:0.0
options:UIViewKeyframeAnimationOptionCalculationModeLinear
animations:^{
[UIView addKeyframeWithRelativeStartTime:0.0
relativeDuration:1/3.0
animations:^{
yourImage.transform = CGAffineTransformMakeRotation(2.0 * M_PI / 3.0);
}];
[UIView addKeyframeWithRelativeStartTime:1/3.0
relativeDuration:1/3.0
animations:^{
yourImage.transform = CGAffineTransformMakeRotation(4.0 * M_PI / 3.0);
}];
[UIView addKeyframeWithRelativeStartTime:2/3.0
relativeDuration:1/3.0
animations:^{
yourImage.transform = CGAffineTransformMakeRotation(0);
}];
}
completion:^(BOOL finished) {
}];
}
else
{
[sender setSelected:NO];
[UIView animateKeyframesWithDuration:2.0
delay:0.0
options:UIViewKeyframeAnimationOptionCalculationModeLinear
animations:^{
[UIView addKeyframeWithRelativeStartTime:0.0
relativeDuration:1/3.0
animations:^{
yourImage.transform = CGAffineTransformMakeRotation(4.0 * M_PI / 3.0);
}];
[UIView addKeyframeWithRelativeStartTime:1/3.0
relativeDuration:1/3.0
animations:^{
yourImage.transform = CGAffineTransformMakeRotation(2.0 * M_PI / 3.0);
}];
[UIView addKeyframeWithRelativeStartTime:2/3.0
relativeDuration:1/3.0
animations:^{
yourImage.transform = CGAffineTransformMakeRotation(0);
}];
}
completion:^(BOOL finished) {
}];
}
}