lua corona - 如何使用 loadRemoteImage 加载图像

Question

我想从 URL 加载图像。 我可以使用以下代码加载图像：

local group = display.newGroup();  
local testImg;  
testImg = display.newImage( "cells/cellBottom.png");  
group:insert( testImg );  

但我需要使用类似的东西：

testImg = display.loadRemoteImage( "https://www.dropbox.com/s/fqlwsa5gupt5rsj/amcCells.png")
group:insert( testImg );  

请告诉我如何加载这张图片。
干杯:)

Answer 1

只需使用 Corona 中给出的示例。这适用于以下网址，但您的网址似乎有问题。

local function networkListener( event )
    if ( event.isError ) then
        print ( "Network error - download failed" )
    else
        event.target.alpha = 0
        transition.to( event.target, { alpha = 1.0 } )
    end

    print ( "event.response.fullPath: ", event.response.fullPath )
    print ( "event.response.filename: ", event.response.filename )
    print ( "event.response.baseDirectory: ", event.response.baseDirectory )
end

display.loadRemoteImage( "http://coronalabs.com/images/coronalogogrey.png", "GET", networkListener, "coronalogogrey.png", system.TemporaryDirectory, 50, 50 )

Answer 2

尝试在监听器中添加 yougroup:insert(event.target)

local function networkListener( event )
if ( event.isError ) then
    print ( "Network error - download failed" )
else
    event.target.alpha = 0
    transition.to( event.target, { alpha = 1.0 } )
    **yourgroup:insert(event.target)**
end

print ( "event.response.fullPath: ", event.response.fullPath )
print ( "event.response.filename: ", event.response.filename )
print ( "event.response.baseDirectory: ", event.response.baseDirectory )

结束

display.loadRemoteImage( "http://coronalabs.com/images/coronalogogrey.png", "GET", networkListener, "coronalogogrey.png", system.TemporaryDirectory, 50, 50)