问题描述
我想我要瞎了，因为我不知道这段代码中的语法错误在哪里:
I think I'm going blind, because I can't figure out where the syntax error is in this code:
if( cell == nil ) {
titledCell = [ [ [ TitledCell alloc ] initWithFrame:CGRectZero
reuseIdentifier:CellIdentifier ] autorelease
];
switch( cellNumber ) {
case 1:
NSString *viewDataKey = @"Name";
etc...
当我尝试编译它时，我得到一个 Error: syntax error before '*' token 在最后一行.
When I try to compile it, I'm getting an Error: syntax error before '*' token on the last line.
很抱歉问了这么一个基本问题，但我错过了什么?
Sorry for such a basic question, but what am I missing?
推荐答案
我手头没有合适的 Objective-C 编译器，但只要 C 结构相同即可:
I don't have a suitable Objective-C compiler on hand, but as long as the C constructs are identical:
switch { ... } 为您提供 一个 块级范围，而不是每个 case 一个.在作用域开头以外的任何地方声明变量都是非法的，并且在 switch 内部是特别危险的，因为它的初始化可能会被跳过.
switch { … } gives you one block-level scope, not one for each case. Declaring a variable anywhere other than the beginning of the scope is illegal, and inside a switch is especially dangerous because its initialization may be jumped over.
以下任一方法能否解决问题?
Do either of the following resolve the issue?
NSString *viewDataKey;
switch (cellNumber) {
case 1:
viewDataKey = @"Name";
…
}
switch (cellNumber) {
case 1: {
NSString *viewDataKey = @"Name";
…
}
…
}
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