针对：先加载资源A，加载完A再加载资源B，加载完B再加载资源C。
现在加需求了，如果加载资源A的时间不超过3s，那说明当前设备性能不错，会额外再加载高品质资源A2，A3，然后再加载B。
local obj1 = PromiseV1.new()
local time1 = os.time()
AsyncLoadRes("ResA", function(textA)
obj1:SetFinished(textA)
end)
local loadResB = function(textA, _obj2)
print("ResA load finish")
local deltaTime = os.time() - time1
if deltaTime < 3 then
local obj1_1 = PromiseV1.new()
AsyncLoadRes("ResA1", function(textA1)
obj1_1:SetFinished(textA1)
end)
local loadResA2 = function(textA1, _obj1_2)
print("ResA1 load finish")
AsyncLoadRes("ResA2", function(textA2)
_obj1_2:SetFinished(textA2)
end)
end
local obj1_2 = obj1_1:Next(loadResA2)
local loadResB = function(textA2, _obj1_3)
print("ResA2 load finish")
AsyncLoadRes("ResB", function(textB)
_obj2:SetFinished(textB)
end)
end
local obj1_3 = obj1_2:Next(loadResB)
else
AsyncLoadRes("ResB", function(textB)
_obj2:SetFinished(textB)
end)
end
end
local obj2 = obj1:Next(loadResB)
local loadResC = function(textB, _obj3)
print("ResB load finish")
AsyncLoadRes("ResC", function(textC)
_obj3:SetFinished(textC)
end)
end
local obj3 = obj2:Next(loadResC)
local printContent = function(textC, _obj4)
print("ResC load finish, all loaded")
end
local obj4 = obj3:Next(printContent)
上面代码的加载链情况
标签：obj1,function,end,SetFinished,lua,例子,promise,local,加载 From： https://www.cnblogs.com/sailJs/p/18362034