目录引言：为什么会有索引键长度问题？一、问题根源深度解析mysql索引长度限制原理实际场景示例二、五大解决方案全景对比三、生产级推荐方案详解方案1：哈希转换法（最佳实践）方案2：配置调优法（适合可控环境）四、
I currently have a UIControl, which has a number of subviews (image, label). Unfortunately when I use addTarget etc. It doesn\'t detect touches on the subviews.
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