在动画中的SubView幻灯片，iphone [英] SubView slide in animation, iphone

问题描述

我有一个包含两个UIButtons的UIview。

I have a UIview Containing two UIButtons.

-(void)ViewDidLoad
{
    geopointView = [[UIView alloc] initWithFrame:CGRectMake(0, 350, 120, 80)];
    geopointView.backgroundColor = [UIColor greenColor]; 

    UIButton *showGeoPointButton = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
    showGeoPointButton.frame = CGRectMake(0, 0, 120, 40);
    showGeoPointButton.titleLabel.font = [UIFont systemFontOfSize:13.0];
    [showGeoPointButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[showGeoPointButton addTarget:self action:@selector(showPlaces:) forControlEvents:UIControlEventTouchUpInside];

    UIButton *SaveButton = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain] 
    SaveButton.frame = CGRectMake(0, 40, 120, 40);
    SaveButton.titleLabel.font = [UIFont systemFontOfSize: 15.0];
    [SaveButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    [SaveButton addTarget:self action:@selector(savePlacePopUp) forControlEvents:UIControlEventTouchUpInside];

    [geopointView addSubview:showGeoPointButton];
    [geopointView addSubview:SaveButton];
}

我希望在调用以下方法时动画显示UIview的幻灯片。

I want to animate slide in of UIview when following method is called.

-(void) showAnimation

我尝试按照以下方式进行，但我看不到动画。我该怎么办？

I tried to do it by following way but I can see no animation. How can I do it?

-(void) showAnimation{
    [UIView animateWithDuration:10.0 animations:^{
        [self.view addSubview:geopointView];
    }];
}

提前获得任何帮助。

推荐答案

您需要添加一个帧值，该值是您希望动画开始的地方（屏幕外？）然后更改动画中的帧值块。框架将在持续时间内发生变化，从而导致运动的出现。该视图必须已经是一个子视图 - 我不相信添加子视图是你可以动画的东西，这没有任何意义。

You need to add the subview with a frame value that is where you want the animation to begin from (off-screen?) then change the frame value inside your animation block. The frame will change over the duration, causing the appearance of movement. The view must already be a subview - I don't believe adding a subview is something you can animate, it makes no sense.

-(void)showAnimation {

    [self.view addSubview:geopointView]
    geopointView.frame = // somewhere offscreen, in the direction you want it to appear from
    [UIView animateWithDuration:10.0 
                     animations:^{
                         geopointView.frame = // its final location
                     }];
}

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