修复重置 loadingDelay 为 undefined 后，定时器没有被清理而导致 loading 始终为 true 的 bug#2726
Open
guaijie wants to merge 1 commit intoalibaba:masterfrom
Open
修复重置 loadingDelay 为 undefined 后，定时器没有被清理而导致 loading 始终为 true 的 bug#2726guaijie wants to merge 1 commit intoalibaba:masterfrom
guaijie wants to merge 1 commit intoalibaba:masterfrom
