为什么我的屏幕镜像搜索不到电视呢

请问楼主使用什么型号的电视？

除 Apple TV 外，隔空播放还支持以下型号的电视或机顶盒：

• AOC Roku TV
• ATVIO Roku TV
• Element Roku TV (Series 400, Series 450)
• Hisense Roku TV (R6, R7 & R8 Series)
• Hitachi Roku TV
• InFocus Roku TV
• JVC Roku TV (Select, Premier and Elite Series)
• LG OLED (2018, 2019, 2020)*
• LG SuperUHD SK 9, 8 series (2018)
• LG UHD UK 62 series or above, UK 7 series (2018)
• LG NanoCell NANO 9, 8 series (2020)*
• LG UHD UN 8 series (2020)*
• LG UHD UN 71 series or above (2020)*
• LG NanoCell SM 9, 8 series (2019)
• LG UHD UM 7, 6 series (2019)
• Magnavox Roku TV (55MV379R/F7, 65MV379F/F7)
• onn. Roku TV (10012588, 100024699, 100012584, 100005396, 100005397, 100012587, 100012585, 100012586)
• Philco Roku TV
• Philips Roku TV (4000 Series)
• RCA Roku TV (RTRQ6522-US, RTRU5027-US, RTRU5527-W, RTRU6527-US, RTRQ5522-US, RTRU4927-US)
• Roku® Express (2017, 2019)
• Roku® Express+ (2017, 2019)
• Roku® Premiere
• Roku® Premiere+
• Roku® Streambar™
• Roku® Streambar Pro™
• Roku® Streaming Stick™
• Roku® Streaming Stick®+
• Roku® Streaming Stick®+ Headphone Edition
• Roku® Ultra (2019, 2020)
• Roku® Ultra LT
• Roku® 3 (2013)
• Samsung FHD/HD 4, 5 Series (2018)
• Samsung QLED 4K Q6, Q7, Q8, Q9 Series (2018, 2019, 2020)
• Samsung QLED 8K Q9 Series (2019, 2020)
• Samsung The Frame Series (2018, 2019, 2020)
• Samsung Serif Series (2019, 2020)
• Samsung UHD 6, 7, 8 Series (2018, 2019, 2020)
• Sanyo Roku TV (FW50R79FC, FW55R70F, FW55R79FC, FW65R70F, FW65R79FC)
• Sharp Roku TV (2T-C45CF2UR, 4T-C60CL2UR)
• Sony A8H Series (2020)
• Sony A9F Series (2018)
• Sony A9G Series (2019)
• Sony A9S Series (2020)
• Sony X85G Series (2019 55”, 65”, 75”, and 85” models)
• Sony X80H Series (2020)
• Sony X85H Series (2020)
• Sony X95G Series (2019)
• Sony X90H Series (2020)
• Sony X95H Series (2020)
• Sony X80J Series (2021)
• Sony X85J Series (2021)
• Sony X90J Series (2021)
• Sony X91J Series (2021)
• Sony X95J Series (2021)
• Sony Z9F Series (2018)
• Sony Z9G Series (2019)
• Sony Z8H Series (2020)
• Sony Z9J Series (2021)
• TCL Roku TV (4-Series, 5-Series, 6-Series & 8-Series)
• VIZIO OLED (2020)*
• VIZIO P-Series Quantum X (2019, 2020)*
• VIZIO P-Series Quantum (2018, 2019, 2020)*
• VIZIO P-Series (2016, 2017, 2018)
• VIZIO M-Series Quantum (2019, 2020)*
• VIZIO M-Series (2016, 2017, 2018)
• VIZIO E-Series (2016, 2017, and 2018 UHD models)
• VIZIO V-Series (2019, 2020)*
• VIZIO D-Series (2018, 2019)
• Westinghouse Roku TV (UX Series, UT Series)

参考：

https://support.apple.com/zh-cn/HT208728

https://www.apple.com/ios/home/accessories/#section-tv

支持投屏但並不一定是 AirPlay 協議, 你要看你電視是不是支持 AirPlay 協議

首先你的电视之前是否可使用iPhone投屏。

不行的话 只能买个带有投屏功能的路由器解决。