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<template>
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<view class="u-demo">
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<view class="u-demo-wrap">
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<view class="u-demo-title">演示效果</view>
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<view class="u-demo-area u-flex u-row-center">
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<u-image :shape="shape" ref="uImage" :width="width" :height="height" :src="src" mode="aspectFill">
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<u-loading size="44" mode="flower" slot="loading" v-if="loadingSlot"></u-loading>
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<view v-if="errorSlot" slot="error" style="font-size: 24rpx;">加载失败</view>
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</u-image>
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</view>
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</view>
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<view class="u-config-wrap">
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<view class="u-config-title u-border-bottom">参数配置</view>
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<view class="u-config-item">
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<view class="u-item-title">状态</view>
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<u-subsection :current="statusCurrent" :list="['加载成功', '加载中', '加载失败']" @change="statusChange"></u-subsection>
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</view>
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<!-- 微信小程序中，无法动态切换slot，所以隐藏此部分的演示 -->
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<!-- #ifndef MP-WEIXIN -->
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<view class="u-config-item">
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<view class="u-item-title">加载中状态</view>
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<u-subsection :list="['默认', '自定义']" @change="loadingChange"></u-subsection>
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</view>
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<!-- #endif -->
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<view class="u-config-item">
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<view class="u-item-title">加载失败状态</view>
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<u-subsection :list="['默认', '自定义']" @change="errorChange"></u-subsection>
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</view>
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<view class="u-config-item">
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<view class="u-item-title">形状</view>
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<u-subsection :list="['方形', '圆形']" @change="shapeChange"></u-subsection>
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</view>
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</view>
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</view>
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</template>
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<script>
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export default {
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data() {
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return {
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src: 'https://cdn.uviewui.com/uview/example/fade.jpg',
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width: '200',
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height: '200',
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loadingSlot: false,
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statusCurrent: 0,
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errorSlot: false,
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shape: 'square'
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};
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},
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computed: {
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// statusCurrent() {
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// }
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},
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methods: {
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statusChange(index) {
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// 此处通过ref操作组件内部状态，仅是为了演示使用，实际中无需这些操作，由内部的图片加载事件自动完成
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if (index == 0) {
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this.src = 'http://img5.imgtn.bdimg.com/it/u=2438062088,2808868405&fm=26&gp=0.jpg';
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this.$refs.uImage.loading = false;
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this.$refs.uImage.isError = false;
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} else if (index == 1) {
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this.$refs.uImage.loading = true;
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} else {
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this.$refs.uImage.loading = false;
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this.$refs.uImage.isError = true;
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}
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},
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loadingChange(index) {
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this.statusCurrent = 1;
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this.statusChange(1);
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if (index == 0) {
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this.loadingSlot = false;
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} else {
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this.loadingSlot = true;
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}
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},
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errorChange(index) {
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this.statusCurrent = 2;
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this.statusChange(2);
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if (index == 0) {
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this.errorSlot = false;
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} else {
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this.errorSlot = true;
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}
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},
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shapeChange(index) {
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this.shape = index == 0 ? 'square' : 'circle';
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}
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}
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};
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</script>
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<style scoped lang="scss">
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.u-demo-area {
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}
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</style>
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