1、数组转字符串：
NSString * str= [stringArrcomponentsJoinedByString:@";"];
2、字符串转数组：
NSArray* array = [self.appendStringcomponentsSeparatedByString:@";"];
NSArray*arr1 = [[NSArrayalloc]initWithObjects:@"0",@"5",nil];
NSData*data = [NSKeyedArchiverarchivedDataWithRootObject:arr1];
NSArray*arr2 = [NSKeyedUnarchiverunarchiveObjectWithData:data];
NSLog(@"->%@",[arr1objectAtIndex:1]);
NSLog(@"->%@",[arr2objectAtIndex:1]);
