SPI problem of STM32

There is a problem that data can not be read from the flash when I use SPI to operate W25Q64.I spent a week in solving this problem.I use logic analyer to observe the waveform,but I found no problem.I found that I forget to add the sFLASH_WaitForWriteEnd() founction in the erase function after I refer to the program of zhengdianyuanzi.

This function is in the example,but I forget to add it in the erase function.