iOS Knowledge points Summary

1. Monitor network status:

- (void) checknetwork {__block NSString*tips; _reachiabilitymanager=[Afnetworkreachabilitymanager Manager]; [_reachiabilitymanager Setreachabilitystatuschangeblock:^(afnetworkreachabilitystatus status) {Switch(status) { Case-1: {Tips=@"Unknown network error";  Break; }             Case 0: {Tips=@"No network, please check the network";  Break; }             Case 1: {Tips=@"data traffic for the current connection";  Break; }             Case 2: {Tips=@"Wi-Fi is currently connected";  Break; }            default:                 Break; }        if(tips.length) {//Tips        }    }]; [_reachiabilitymanager startmonitoring];}

2. Enter the live page to determine the permissions:

//determine if it is an emulator        if([[[Uidevice Currentdevice] issimulator]) {[Self shownoticemessage:@"please run with the real machine"]; returnNO; }                //determine if there is a camera        if(![Uiimagepickercontroller Issourcetypeavailable:uiimagepickercontrollersourcetypecamera]) {[Self shownoticemessage:@"your device does not have a webcam or related driver and cannot be streamed"]; returnNO; }                //determine if camera permissions are availableAvauthorizationstatus Authorizationstatus =[Avcapturedevice Authorizationstatusformediatype:avmediatypevideo]; if(Authorizationstatus = = avauthorizationstatusrestricted| | authorizationstatus = =avauthorizationstatusdenied) {[Self shownoticemessage:@"the app needs to access your webcam. \ n Please enable webcam-settings/privacy/webcam"]; returnNO; }                //Turn on Microphone permissionsAvaudiosession *audiosession =[Avaudiosession sharedinstance]; if([audiosession respondstoselector: @selector (requestrecordpermission:)]) {[Audiosession performselector:@s Elector (requestrecordpermission:) Withobject:^(BOOL granted) {if(granted) {returnYES; } Else{[Self shownoticemessage:@"the app needs to access your microphone. \ n Please enable microphone-settings/privacy/Microphone"]; returnNO;        }            }]; }

3. Third parties for live use:

Video playback: ijkmediaframework

Barrage: Barragerenderer

Push Flow: Lflivekit

SOURCE Learning: Https://github.com/SunLiner/MiaowShow

Countdown in 4.Cell:

///Execute once per second- (void) Countdownwithper_secblock: (void(^) ()) Per_secblock {if(_timer==Nil) {dispatch_queue_t Queue= Dispatch_get_global_queue (Dispatch_queue_priority_default,0); _timer= Dispatch_source_create (Dispatch_source_type_timer,0,0, queue); Dispatch_source_set_timer (_timer,dispatch_walltime (NULL,0),1.0*nsec_per_sec,0);//executes per secondDispatch_source_set_event_handler (_timer, ^{Dispatch_async (Dispatch_get_main_queue (),^{per_secblock ();        });        });    Dispatch_resume (_timer); }}

5. Set "Search highlighting" when searching:

 //  set search highlighting   If  (Model.searchKeyWord.length > 0  //  Find special text from all text  Nsrange range = [Model.titlestr RangeOfString:model.searchKeyWord];  if  (range.location! = Nsnotfound && range.length > 0  ) {nsmutableattributedstring  *muattstr = [[Nsmutableattributedstring alloc] initWithString:model.titleStr];            [Muattstr addattribute:nsforegroundcolorattributename Value:blue_color Range:range];        Self.titleLabel.attributedText  = Muattstr; }            }

iOS Knowledge points Summary