Afnetworking breakpoint resume, download picture

Download Image : Saved in a local file after downloading pictures

Both the lock and suspend states are downloaded Nsurlrequest *request=[[nsurlrequest alloc]initwithurl:[nsurl urlwithstring:@ "/http/  Attach.bbs.miui.com/forum/201110/05/082552rm0v11zlv1axd13l.png "];  Operation configuration Afhttprequestoperation *requestoperator=[[afhttprequestoperation Alloc]initwithrequest:request];  Requestoperator.responseserializer=[afimageresponseserializer Serializer]; [Requestoperator setcompletionblockwithsuccess:^ (afhttprequestoperation *operation, id responseObject)      {//The main thread executes self.pictureview.image=responseobject;      NSString *filedestination=[nshomedirectory () stringbyappendingstring:@ "/documents/1.png"]; <span style= "color: #ff6666;"     >//if Respondobject is NSData, then use the following method </span>/*nsfilemanager *filemanage=[nsfilemanager Defaultmanager];     if ([Filemanage createfileatpath:filedestination contents:imgdata Attributes:nil]) {NSLog (@ "%@", filedestination);     }*/if ([UIImageJPEGRepresentation (Responseobject, 1.0) writetofile:filedestination Atomically:yes]) {     After successful run NSLog (@ "%@", filedestination);  }} failure:^ (Afhttprequestoperation *operation, Nserror *error) {NSLog (@ "error:%@", error);  }]; Listen for download progress [Requestoperator setdownloadprogressblock:^ (Nsuinteger bytesread, Long long totalbytesread, long long      Totalbytesexpectedtoread) {self.progressview.progress=totalbytesread*1.0/totalbytesexpectedtoread;  NSLog (@ "%.3f", Totalbytesread*1.0/totalbytesexpectedtoread);  }];   Start execution [requestoperator start];

Breakpoint Continuation: pause and start the download button I am a button, so I define the afhttprequestoperation * Resumeoperation and a bool type of resume are judged for continuation.

Because self is called in the block, memory leaks are caused, so the __weak weakself is defined to solve the memory leak problem

/span>

<span style= "LINE-HEIGHT:18PX; Font-family:consolas, ' Courier New ', Courier, mono, serif; margin:0px; padding:0px; Border:none; Background-color:inherit; " ><span style=</span><span class= "string" style= "LINE-HEIGHT:18PX; Font-family:consolas, ' Courier New ', Courier, mono, serif; margin:0px; padding:0px; Border:none; Color:blue; Background-color:inherit; " > "COLOR: #ff0000;" </span><span style= "LINE-HEIGHT:18PX; Font-family:consolas, ' Courier New ', Courier, mono, serif; margin:0px; padding:0px; Border:none; Background-color:inherit; " >>__weak </span><span class= "keyword" style= "line-height:18px; Font-family:consolas, ' Courier New ', Courier, mono, serif; margin:0px; padding:0px; Border:none; Color:rgb (0, 102, 153); Background-color:inherit; Font-weight:bold; " >viewcontroller</span><span style= "LINE-HEIGHT:18PX; Font-family:consolas, ' Courier New ', Courier, mono, serif; margin:0px; padding:0px; BordEr:none; Background-color:inherit; " > *weakself=</span><span class= "keyword" style= "line-height:18px; Font-family:consolas, ' Courier New ', Courier, mono, serif; margin:0px; padding:0px; Border:none; Color:rgb (0, 102, 153); Background-color:inherit; Font-weight:bold; " >self</span><span style= "LINE-HEIGHT:18PX; Font-family:consolas, ' Courier New ', Courier, mono, serif; margin:0px; padding:0px; Border:none; Background-color:inherit; " >;</span>  </span>

if (!self.resumeoperation) {nsurlrequest *request=[[nsurlrequest alloc]initwithurl:[nsurl URLWithString:@ "http://a          Ttach.bbs.miui.com/forum/201110/05/082552rm0v11zlv1axd13l.png "];          Self.resumeoperation=[[afhttprequestoperation Alloc]initwithrequest:request];          Self.resumeoperation.responseserializer=[afimageresponseserializer Serializer]; [Weakself.resumeoperation setcompletionblockwithsuccess:^ (afhttprequestoperation *operation, id responseObject)              {//The main thread executes self.pictureview.image=responseobject;              Save file NSString *filedestination=[nshomedirectory () stringbyappendingstring:@ "/documents/1.png"]; if ([UIImageJPEGRepresentation (Responseobject, 1.0) writetofile:filedestination Atomically:yes]) {NSLog              (@ "%@", filedestination);                        } Self.resumeoperation=nil; } failure:^ (Afhttprequestoperation *operation, Nserror *error) {self.Resumeoperation=nil;          NSLog (@ "error:%@", error);          }]; Listen for download progress [weakself.resumeoperation setdownloadprogressblock:^ (Nsuinteger bytesread, Long long Totalbytesread, Lon              G long Totalbytesexpectedtoread) {self.progressview.progress=totalbytesread*1.0/totalbytesexpectedtoread;          NSLog (@ "%.3f", Totalbytesread*1.0/totalbytesexpectedtoread);          }];      Start execution [self.resumeoperation start];          }else if (!self.resume) {[self.resumeoperation pause];      Self.resume=yes;          }else{//Continue [self.resumeoperation resume];      Self.resume=no;   }

Afnetworking breakpoint resume, download picture