Question

这是奇怪的事情，我通过以下代码移动UIView的位置，它在ios7中完美运行，但在ios8动画中重置动画，即使我在控制器中查找任何标签的文本，这对我来说真的很奇怪

if (!self.setTouch) {
    [UIView animateWithDuration:kViewAnimateWithDuration
    delay:kViewDelay
    options:UIViewAnimationOptionCurveEaseInOut |
    UIViewAnimationOptionAllowUserInteraction
    animations:^{
        //Move frame or transform view
        [self.sliderView setFrame:CGRectMake(self.sliderView.frame.origin.x,-205,self.sliderView.frame.size.width,249)];
        self.setTouch = YES;
        // [self.containerView setFrame:CGRectMake(self.bottomView.frame.origin.x, self.bottomView.frame.origin.y +171, width_b, height_b -171)];
    } completion:^(BOOL finished) {
        self.setTouch = YES;
    }];
} else {
    [UIView animateWithDuration:kViewAnimateWithDuration
    delay:kViewDelay
    options:UIViewAnimationOptionCurveEaseInOut |
    UIViewAnimationOptionAllowUserInteraction
    animations:^{
        [self.sliderView setFrame:CGRectMake(self.sliderView.frame.origin.x,0.0f,self.sliderView.frame.size.width,249.0)];
        self.setTouch = NO;
    } completion:^(BOOL finished) {
        self.setTouch = NO;
    }];
}

以下是更改标签文字的代码：

NSTimer *timer= [NSTimer scheduledTimerWithTimeInterval:5.0 target:self
    selector:@selector(change_announcement:) userInfo:nil repeats:YES];

这是实际的方法：

(IBAction)change_announcement:(id)sender {
    if ([_announcements count] == 0) {
        return;
    }

    AnnouncementDAO *ob = [_announcements objectAtIndex:_index];

    if(_isArabic){
        // [_label_announcementEn setHidden:YES];
        //[_label_announcementAr setHidden:NO];
        [_label_announcementAr setText:ob.announcementArabicTitle];
    } else{
        //  [_label_announcementAr setHidden:YES];
        // [_label_announcementEn setHidden:NO];
        [_label_announcementEn setText:ob.announcementEngTitle];
    }

    if (_index >= [_announcements count]-1) {
        // NSLog(@"Make index 0");
        _index = -1;
    }
    _index ++;
}

当我在NSLog sliderView约束时，我看到以下输出：

"<NSIBPrototypingLayoutConstraint:0x7b048740 'IB auto generated at build time for view with fixed frame' H:|-(0)-[UIView:0x7b04b6a0](LTR)   (Names: '|':UIView:0x7b04b710 )>",
"<NSIBPrototypingLayoutConstraint:0x7b048710 'IB auto generated at build time for view with fixed frame' V:|-(0)-[UIView:0x7b04b6a0]   (Names: '|':UIView:0x7b04b710 )>",
"<NSIBPrototypingLayoutConstraint:0x7b0486e0 'IB auto generated at build time for view with fixed frame' H:[UIView:0x7b04b6a0(768)]>",
"<NSIBPrototypingLayoutConstraint:0x7b0486b0 'IB auto generated at build time for view with fixed frame' V:[UIView:0x7b04b6a0(25)]>",
"<NSIBPrototypingLayoutConstraint:0x7b048680 'IB auto generated at build time for view with fixed frame' H:|-(348)-[UIButton:0x7b0e72b0](LTR)   (Names: '|':UIView:0x7b04b710 )>",
"<NSIBPrototypingLayoutConstraint:0x7b048650 'IB auto generated at build time for view with fixed frame' V:|-(206)-[UIButton:0x7b0e72b0]   (Names: '|':UIView:0x7b04b710 )>",
"<NSIBPrototypingLayoutConstraint:0x7b048620 'IB auto generated at build time for view with fixed frame' H:[UIButton:0x7b0e72b0(73)]>",
"<NSIBPrototypingLayoutConstraint:0x7b0485f0 'IB auto generated at build time for view with fixed frame' V:[UIButton:0x7b0e72b0(22)]>",
"<NSIBPrototypingLayoutConstraint:0x7b0485c0 'IB auto generated at build time for view with fixed frame' H:|-(0)-[UIView:0x7b04d690](LTR)   (Names: '|':UIView:0x7b04b710 )>",
"<NSIBPrototypingLayoutConstraint:0x7b048590 'IB auto generated at build time for view with fixed frame' V:|-(25)-[UIView:0x7b04d690]   (Names: '|':UIView:0x7b04b710 )>",
"<NSIBPrototypingLayoutConstraint:0x7b048560 'IB auto generated at build time for view with fixed frame' H:[UIView:0x7b04d690(768)]>",
"<NSIBPrototypingLayoutConstraint:0x7b048530 'IB auto generated at build time for view with fixed frame' V:[UIView:0x7b04d690(181)]>"

Answer 1

首先关闭..将您的代码更改为此...

[UIView animateWithDuration:kViewAnimateWithDuration
                      delay:kViewDelay
                    options:UIViewAnimationOptionCurveEaseInOut | UIViewAnimationOptionAllowUserInteraction
                 animations:^{
                     CGRect sliderFrame = self.sliderView.frame;

                     if (!self.setTouch) {
                         //Move frame or transform view
                         self.sliderView.frame = CGRectMake(CGRectGetMinX(sliderFrame), -205, CGRectGetWidth(sliderFrame), 249);
                         self.setTouch = YES;
                         //[self.containerView setFrame:CGRectMake(self.bottomView.frame.origin.x, self.bottomView.frame.origin.y +171, width_b, height_b -171)];
                     } else {
                         self.sliderView.frame = CGRectMake(CGRectGetMinX(sliderFrame), 0.0, CGRectGetWidth(sliderFrame), 249);
                         self.setTouch = NO;
                     }
                 }
                 completion:nil];

不需要使它变得比它需要的更复杂。

第二......你在使用AutoLayout吗？

修改

您正在使用AutoLayout。这就是为什么它不起作用。使用AutoLayout时，您无法直接更改视图的框架。

要为视图设置动画（或者只是移动视图），您必须更改该视图周围的约束。您无法触摸框架或中心。它只是没有用。

您需要获取要更改的约束的引用，并使用它来移动滑块视图。

我建议您查看Ray Wenderlich的网站。有一些很棒的AutoLayout教程可以用AutoLayout覆盖动画。

[更改标签文本后重置UIView animateWithDuration动画

1 个答案: