<分区>
<分区>
附加代码返回错误:
Control may reach end non-void function
代码:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
if (indexPath.row == 0) {
FirstCustomCell *fCustomCell = [tableView dequeueReusableCellWithIdentifier:@"firstCustomCell" forIndexPath:indexPath];
if (fCustomCell == nil) {
fCustomCell = [[FirstCustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"firstCustomCell"];
}
return fCustomCell;
}
else if (indexPath.row == 1) {
SecondCustomCell *sCustomCell = [tableView dequeueReusableCellWithIdentifier:@"secondCustomCell" forIndexPath:indexPath];
if (sCustomCell == nil) {
sCustomCell = [[SecondCustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"SecondCustomCell"];
}
return sCustomCell;
}
} //<-- Control may reach non-void function (I precise that's the end of the cellForRowAtIndexPath method)
我知道问题出在“return”上，但我该如何排除错误？
最佳答案
您考虑了 indexPath.row == 0 和 indexPath.row == 1 的情况，但编译器说:如果行，我应该返回什么不是 0 或 1 吗？
您可能希望在方法的末尾有一个return nil;。
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.row == 0)
{
FirstCustomCell *fCustomCell = [tableView dequeueReusableCellWithIdentifier:@"firstCustomCell" forIndexPath:indexPath];
if (fCustomCell == nil)
{
fCustomCell = [[FirstCustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"firstCustomCell"];
}
return fCustomCell;
}
else if (indexPath.row == 1)
{
SecondCustomCell *sCustomCell = [tableView dequeueReusableCellWithIdentifier:@"secondCustomCell" forIndexPath:indexPath];
if (sCustomCell == nil)
{
sCustomCell = [[SecondCustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"secondCustomCell"];
}
return sCustomCell;
}
return nil; //<--Add this line
}
或者可能是“其他”情况:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.row == 0)
{
FirstCustomCell *fCustomCell = [tableView dequeueReusableCellWithIdentifier:@"firstCustomCell" forIndexPath:indexPath];
if (fCustomCell == nil)
{
fCustomCell = [[FirstCustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"firstCustomCell"];
}
return fCustomCell;
}
else if (indexPath.row == 1)
{
SecondCustomCell *sCustomCell = [tableView dequeueReusableCellWithIdentifier:@"secondCustomCell" forIndexPath:indexPath];
if (sCustomCell == nil)
{
sCustomCell = [[SecondCustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"secondCustomCell"];
}
return sCustomCell;
}
else //<--Add this clause
{
OtherCustomCell *oCustomCell = [tableView dequeueReusableCellWithIdentifier:@"otherCustomCell" forIndexPath:indexPath];
if (oCustomCell == nil)
{
oCustomCell = [[OtherCustomCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"otherCustomCell"];
}
return sCustomCell;
}
}
注意:您的重用标识符中也有拼写错误:
"secondCustomCell" 与 "SecondCustomCell"
关于ios - 控制可能到达结束非空函数，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/27742523/