Question

目前我正在尝试向UINavigationBar添加按钮。这是我的代码：

[UIView animateWithDuration:0.5
                      delay:0.0
                    options:UIViewAnimationOptionTransitionCurlDown
                 animations:^{
                     self.navigationItem.rightBarButtonItems =[NSArray arrayWithObject:[self.navigationItem.rightBarButtonItems objectAtIndex:0]];
                     searchBar.hidden= NO;
                     searchBar.bounds= CGRectMake(CGRectGetMidX(searchBar.bounds), CGRectGetMidY(searchBar.bounds), CGRectGetWidth(searchBar.bounds)+50, CGRectGetHeight(searchBar.bounds));
}
                 completion:nil
 ];

问题是无论我为动画设置了什么选项，RightBarButtonItem最终都被动画为＆＃34;从左到右飞行＆＃34;。相反，我希望有一个淡入或类似的动画，看着它从左边飞到它右边的位置只是丑陋。

Answer 1

我试图成功，

-(void)viewDidAppear:(BOOL)animated{

UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setTitle:@"Hi" forState:UIControlStateNormal];
[button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[button sizeToFit];

[UIView transitionWithView:button
                  duration:2.0
                   options:UIViewAnimationOptionTransitionFlipFromLeft
                animations:^{
                    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:button];

                } completion:^(BOOL finished) {

 }];

}

您可以尝试更多代码来正确使用它。你可以试试CATransition。玩下面的代码，并告诉我你何时获得成功。祝你好运。

uinavbar添加按钮动画问题

1 个答案: