Question

所以我想要的是当用户点击sideNav按钮时会出现两个单独的动画。当前视图将滑出控制器，新视图将滑入。我为视图设置了两个不同的动画点，但出于某种原因，当用户点击sideNav按钮时，视图会移动，就像它们已连接一样。我做错了什么？

- (IBAction)sideNav:(id)sender {

    if (draw1 == 0) {
        draw1 = 1;
        [UIView beginAnimations:nil context:nil];
        [UIView setAnimationDuration:0.4];
        [UIView setAnimationDelay:0.0];
        [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];

        navView.frame = CGRectMake(0, 0, 320, 568);
        newsView.frame = CGRectMake(320, 0, 320, 568);

        [UIView commitAnimations];
    } else {
        draw1 = 0;
        [UIView beginAnimations:nil context:nil];
        [UIView setAnimationDuration:0.4];
        [UIView setAnimationDelay:0.0];
        [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];

        navView.frame = CGRectMake(-320, 0, 320, 568);
        newsView.frame = CGRectMake(0, 0, 320, 568);

        [UIView commitAnimations];

    }

}

Answer 1

回答问题的一步是简化代码。首先，除非它在其他地方用作整数，draw1应该是BOOL，其值为YES和NO。其次，不需要所有相同的重复代码。理解类似的东西要容易得多：

- (IBAction)sideNav:(id)sender {

    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.4];
    [UIView setAnimationDelay:0.0];
    [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];

    navView.frame = draw1 ? CGRectMake(-320, 0, 320, 568) : CGRectMake(0, 0, 320, 568);
    newsView.frame = draw1 ? CGRectMake(0, 0, 320, 568) : CGRectMake(320, 0, 320, 568);

    [UIView commitAnimations];

    draw1 = !draw1;
}

动画两种观点的问题

1 个答案: