大图片分段发送 iphone

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#define A_RECEIVE 1000     NSData *imageData = UIImageJPEGRepresentation([UIImage imageNamed:@"xxx.jpg"], 1);     NSMutableArray *imageDataArray = [[NSMutableArray alloc] init];     for (int i = 0; i<= [imageData length]-A_RECEIVE; i+=A_RECEIVE) {         lastIValue = i+A_RECEIVE;         NSString *rangeStr = [NSString stringWithFormat:@"%i,%i",i,A_RECEIVE];         NSData *subData = [imageData subdataWithRange:NSRangeFromString(rangeStr)];         [imageDataArray addObject:subData];     }       NSString *rangeStr = [NSString stringWithFormat:@"%i,%i",lastIValue,[imageData length]%A_RECEIVE];     NSData *subData = [imageData subdataWithRange:NSRangeFromString(rangeStr)];     [imageDataArray addObject:subData];           NSMutableData *newData = [[NSMutableData alloc] init];     for (int i = 0; i< [imageDataArray count]; i++) {         [newData appendData:[imageDataArray objectAtIndex:i]];     }     [imageDataArray release];           UIImage *newImage = [[UIImage alloc] initWithData:newData];     [newData release];     [testImage setImage:newImage];     [newImage release];