UItoolBar 设置背景颜色 直接看文档 https://developer.apple.com/library/ios/documentation/UserExperience/Conceptual/TransitionGuide/Bars.html#//apple_ref/doc/uid/TP40013174-CH8-SW5 文档里很全面,很细致 相关文章: 2021-12-12 2021-11-04 2022-01-14 2021-12-27 2021-12-04 2022-12-23