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多图选择器使用指导 · App Inventor 2 中文网
...>= 2 {
图像_2.Picture = select(已选, 2)
}
if length(已选) >= 3 {
图像_3.Picture = select(已选, 3)
}
if length(已选) > 3 {
标签_更多.Text = join("+", length(已选) - 3)
} else {
标签_更多.Text = ""
}
}
案例二：逐张上传多张图片
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