年終活動h5動畫總結

css3 + react-id-swiper + react + redux + saga

1. 動畫相關主要內容：

1. 流星
2. 閃爍星星
3. 字
4. 人的移動（動畫 + 監聽動畫結束時間）
5. 橋
6. 開啟旅程按鈕
7. 旋轉（+ 相容）
8. react-id-swiper

2. css3動畫語法

• animation

animation-name
animation-duration
animation-timing-function  速度曲線
animation-delay
animation-iteration-count
animation-direction
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• transform

transform 屬性向元素應用 2D 或 3D 轉換。該屬性允許我們對元素進行旋轉、縮放、移動或傾斜。 其中 transform-origin (屬性允許改變被轉換元素的位置)。

• transition

三者區別：

3. 示例 github.com/hytStart/Re…

• 流星

.star {
    display: block;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #FFF;
 

    top: 10px;
    left: 200px;
    position: relative;
    animation: star-ani 6s infinite ease-out;
    box-shadow: 0 0 5px 5px rgba(255, 255, 255, .3);
    opacity: 1;
}
.star:after {
    content: '';
    display: block;
    top: 0px;
    left: 40%;
    border: 0px solid #fff;
    border-width: 0px 90px 2px 90px;
    border-color: transparent transparent transparent rgba(255, 255, 255, .3);
    transform: rotate(-45deg) translate3d(1px, 3px, 0);
    box-shadow: 0 0 1px 0 rgba(255, 255, 255, .1);
    transform-origin: 0% 100%;
}

@keyframes star-ani {
    0% {
        opacity: 0;
        transform: scale(0) rotate(0) translate3d(0, 0, 0);
    }
    50% {
        opacity: 1;
        transform: scale(1) rotate(0) translate3d(-100px, 100px, 0);
    }
    100% {
        opacity: 0;
        transform: scale(1) rotate(0) translate3d(-200px, 200px, 0);
    }
}
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• 閃爍星星

.shine {
    background: url('../../../../images/action/icon-star1.png') no-repeat center;
    background-size: 100%;
    width: 30px;
    height: 40px;
    position: absolute;
    top: 90px;
    left: 100px;
    opacity: 0;
    animation: opacity-change 0.5s ease-in-out infinite;
}

@keyframes opacity-change {
    0% {
        opacity: 0;
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0;
    }
}
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• 字

分為兩段動畫

.text-item-0 {
    position: absolute;
    width: 25px;
    height: 75px;
    top: 60px;
    left: 100px;
    background: url('../../../../images/action/S-start.png') no-repeat center;
    background-size: 100%;
    animation: letter-0 1.5s ease-in-out both, letter-0-1 2.0s ease-in-out 1.5s both;
}

@keyframes letter-0 {
    0% {
        transform: translateY(0)
    }
    50% {
        transform: translateY(80px)
    }
    100% {
        transform: translateY(0px)
    }
}
@keyframes letter-0-1 {
    0% {
        opacity: 1;
    }
    100% {
        top: -80px;
        opacity: 0;
    }
}
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• 人移動

切換dom，新增類控制移動和暫停，以及切換背景人物。監聽animationend事件。

jsx
{
    peopleMove ?
        <div
            className={`${style.people_move} ${!pausedState && style.people_paused}`}
            ref={start2 => { this.start2 = start2 }}
        />
        :
        <div className={style.people} />
}
css
.people {
    width: 20px;
    height: 64px;
    position: absolute;
    left: 10px;
    top: 130px;
    background: url('../../../../images/action/people.png') no-repeat center;
    background-size: 100%; 
    opacity: 0;
    animation: peopleUp 1s ease-in-out 0.5s both;
}
.people_move {
    background: url('../../../../images/action/people_moveleft.gif');
    background-size: 100% 100%;
    background-position: center;
    background-repeat: no-repeat;
    width: 20px;
    height: 64px;
    position: absolute;
    left: 10px;
    top: 130px;
    opacity: 1;
    animation: PeopleMove 1.5s linear 0s both;
}
.people_paused {
    width: 20px;
    height: 64px;
    background: url('../../../../images/action/people.png');
    background-size: 100% 100%;
    background-position: center;
    background-repeat: no-repeat;
    animation-play-state: paused;
}

@keyframes peopleUp {
    0% {
        opacity: 0;
    }
    100% {
        opacity: 1;
    }
}
@keyframes PeopleMove {
    0% {
        left: 10px;
        top: 130px;
    }
    100% {
        top: 20px;
        left: 180px;
        background-size: 100% 100%;
        background-position: center;
        background-repeat: no-repeat;
    }
}

// 監聽動畫結束時機
componentDidUpdate() {
    const { peopleMove } = this.state
    if (peopleMove) {
        this.start2.addEventListener('animationend', this.end)
        this.start2.addEventListener('webkitAnimationEnd', this.end)
        this.start2.addEventListener('mozAnimationEnd', this.end)
        this.start2.addEventListener('oAnimationEnd', this.end)
    }
}
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• 橋的出現

配合background-size: cover;屬性實現。

.brige {
    width: 0px;
    background: url('../../../../images/action/bridge.png');
    background-size: cover;
    background-repeat: no-repeat;
    height: 100px;
    position: absolute;
    top: 40px;
    left: 30px;
    animation: BridgeFadeIn 3s linear both;
    opacity: 0;
}

@keyframes BridgeFadeIn {
    0% {
        width: 0px;
        opacity: 0;
    }
    100% {
        width: 200px;
        opacity: 1;
    }
}
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• 漸變大（開始旅程）

利用transform scale2D 縮放轉換。

.icon-ciecle {
    display: block;
    position: absolute;
    left: 100px;
    top: 80px;
    width: 30px;
    height: 30px;
    background: url('../../../../images/action/icon-light.png') no-repeat center;
    background-size: 100%; 
    animation: warn 1.2s ease-in-out 0s infinite both;
}

@keyframes warn {
    0% {
        transform: scale(0.1);
        opacity: 0.0;
    }
    25% {
        transform: scale(0.2);
        opacity: 0.3;
    }
    50% {
        transform: scale(0.4);
        opacity: 0.5;
    }
    75% {
        transform: scale(0.6);
        opacity: 0.7;
    }
    100% {
        transform: scale(0.8);
        opacity: 0.0;
    }
}
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• 旋轉

ios的animation-play-state: paused;不起作用，且animation動畫不可寫在新增類裡，必須寫在一個類裡。（不確定）

.music_img {
    width: 40px;
    height: 40px;
    display: block;
    position: absolute;
    left: 100px;
    top: 80px;
    animation: rotating 3s linear infinite;
    animation-play-state: running;
}
.rotate-pause {
    animation-play-state: paused;
}

@keyframes rotating {
    0% {
    	transform: rotate(0deg);
     }
    100% { 
	transform: rotate(360deg);
     }
}
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• react-id-swiper

Swiper的react版本，基本api都支援，具實驗目測相當於Swiper v4。

1. 不一定通過api。也可以通過重寫css實現。
2. 重寫css切換效果的話，會影響它本身的動畫效果，所以可以通過新增不可滑動來控制。

1. 
.swiper-wrapper {
    transition-delay: 1.6s;
}
2. 
noSwiping: true,
noSwipingClass: 'stop-swiping',
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4. 動畫總結

別人寫的真牛X,自己只會opacity,translate。

5. 待完善

• html2canvas
• 資源載入
• jsbridge使用與注意事項