ios - 如何让 iPad 旋转更流畅？

Question

我将向您展示两种方法：第一个“redefineLayout”计算元素的新位置，第二个是旋转后的钩子“didRotateFromInterfaceOrientation”。

- (void)redefineLayout
{
    int margin = 20;
    int buttonWidth = ((int)self.view.frame.size.width - margin * 4)/3;

    [self.buttonNewOrder setFrame:CGRectMake(margin, 20, buttonWidth, 200)];
    [self.buttonStatistics setFrame:CGRectMake(margin * 2 + buttonWidth, 20, buttonWidth, 200)];
    [self.buttonSincronize setFrame:CGRectMake(margin * 3 + buttonWidth * 2, 20, buttonWidth, 200)];
}

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
    [self redefineLayout];
}

我的界面可以工作，但在旋转之后，我看到元素做出了快速而难看的运动。我想让这个动作更加流畅。有什么建议吗？

---

我的解决方案：

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
    [self redesignLayout:duration];
}

- (void)redesignLayout:(NSTimeInterval)duration {
    [UIView animateWithDuration:duration animations:^{
        int margin = 20;
        int buttonWidth = (((int)self.view.frame.size.width) - margin * 4)/3;
        [self.buttonNewOrder setFrame:CGRectMake(margin, 20, buttonWidth, 200)];
        [self.buttonStatistics setFrame:CGRectMake(margin * 2 + buttonWidth, 20, buttonWidth, 200)];
        [self.buttonSincronize setFrame:CGRectMake(margin * 3 + buttonWidth * 2, 20, buttonWidth, 200)];
    }];
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self initLayout];
    [self redesignLayout:0];
}

Answer 1

尝试用didRotateFromInterfaceOrientation这个替换你的电话：

- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation duration:(NSTimeInterval)duration
{
    [UIView animateWithDuration:duration animations:^{
        [self redefineLayout];
    }];
}