android toolbox can DFU，but ios toolbox can't DFU

[FormerMember]

hello everyone：

I use nordic APPtoolbox to test DFU ,android toolbox can DFU，but ios toolbox can't DFU

1、 i use sdk9.0 dfu project,and sdk9.0 ancs project 2、blog.chinaunix.net/xmlrpc.php add code like this web page 3、i use android to test it some times,it's ok.But when i use iPhone's toolbox,it's not ok.and the ios APP printf the log,it show "Reading DFU Version characteristic failed"

[FormerMember]

Info: Connected to DfuTarg Verbose: Discovering services... Debug: peripheral.discoverServices([00001530-1212-EFDE-1523-785FEABCD123]) Info: Services discovered Verbose: Legacy DFU Service found Verbose: Discovering characteristics in DFU Service... Debug: peripheral.discoverCharacteristics(nil, for: 00001530-1212-EFDE-1523-785FEABCD123) Info: DFU characteristics discovered Verbose: Reading DFU Version number... Debug: peripheral.readValue(00001534-1212-EFDE-1523-785FEABCD123) Error: Reading DFU Version characteristic failed Error: Error 1: The handle is invalid. Verbose: Writing to characteristic 00001531-1212-EFDE-1523-785FEABCD123... Debug: peripheral.writeValue(0x06, for: 00001531-1212-EFDE-1523-785FEABCD123, type: .withResponse) Application: Reset (Op Code = 6) request sent