iphone - 出现错误 - 'control reaches end of non-void function'

Question

嘿，在带有 } 的行上出现此错误“控制到达非 void 函数的末尾”。我究竟做错了什么？请帮忙

(NSString *)tableView:(UITableView *)tableView         titleForHeaderInSection:(NSInteger)section {
 NSLog(@"Here16");
 if (section == 0) {
  return @"A";
 }

 if (section == 1) {
  return @"B";
 }
 if (section == 2) {
  return @"C";
 }
 if (section == 3) {
  return @"D";
 }
 if (section == 4) {
  return @"E";
 }
 if (section == 5) {
  return @"F";
 }
 if (section == 6) {
  return @"G";
 }
 if (section == 7) {
  return @"H";
 }
 if (section == 8) {
  return @"I";
 }
 if (section == 9) {
  return @"J";
 }
 if (section == 10) {
  return @"K";
 }
 if (section == 11) {
  return @"L";
 }
 if (section == 12) {
  return @"M";
 }
 if (section == 13) {
  return @"N";
 }
 if (section == 14) {
  return @"O";
 }
 if (section == 15) {
  return @"P";
 }
 if (section == 16) {
  return @"Q";
 }

 if (section == 17) {
  return @"R";
 }
 if (section == 18) {
  return @"S";
 }
 if (section == 19) {
  return @"T";
 }
 if (section == 20) {
  return @"U";
 }
 if (section == 21) {
  return @"V";
 }
 if (section == 22) {
  return @"V";
 }
 if (section == 23) {
  return @"W";
 }
 //if (section==0) {
  //return @"X";
 //}
 if (section == 24) {
  return @"Y";
 }
 if (section == 25) {
  return @"Z";
 }

 //NSLog(@"%d", [listOfItems count]);



 NSLog(@"That whole error thing");
}

Answer 1

如果您收到的信件不在您的选择范围内，则不会有任何退还。 (这可能永远不会发生，但这是一个警告......)

尝试在方法末尾添加return nil;