我正在尝试找到正在屏幕上动画的iPhone ImageView的当前位置。
我这样创建并对imageView进行动画处理:
-(IBAction)button:(UIButton *)sender{
UIImageView *myImageView =[[UIImageView alloc] initWithImage:
[UIImage imageNamed:@"ball.png"]];
myImageView.frame = CGRectMake(0, self.view.frame.size.height/2, 40, 40);
[self.view addSubview:myImageView];
[myArray addObject:myImageView];
[UIView animateWithDuration:.5
delay:0
options:(UIViewAnimationOptionAllowUserInteraction) // | something here?)
animations:^{
myImageView.frame = CGRectOffset(myImageView.frame, 500, 0);
}
completion:^(BOOL finished){
[myArray removeObject:myImageView];
[myImageView removeFromSuperview];
[myImageView release];
}
];
}
然后为了检测imageView当前的CGPoint,我每60分之一秒调用一次这个方法。
-(void)findPoint{
for (UIImageView *projectile in bullets) {
label.text = [NSString stringWithFormat:@"%f", projectile.center.x];
label2.text = [NSString stringWithFormat:@"%f", projectile.center.y];
}
}
然而,这只给了我动画结束时的点,我想要获取正在跨越屏幕移动的图像的当前CGPoint。除了UIViewAnimationOptionAllowUserInteraction之外,还需要应用其他选项吗?如果没有,那么如何获取正在动画化的imageView的当前位置?