目录引言一、关键性能指标解读1. QPS（Queries Per Second）：每秒查询数2. TPS（Transactions Per Second）：每秒事务数3. 缓存命中率二、性能监控工具介绍与使用1. SHOW STATUS2. Prometheus + Grafana（1）安装与
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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