Question

“entergraph

BUT! 在以下会议之前加上随机发言:

“entergraph

任何想法?

Answer 1

这只字不提换语,限制了C语。在C,在个案标签之后的第一份说明不能成为变式声明。可以通过在开关报表前宣布变数或在编码范围内制造变数来解决这一问题(见下文)。显然,你还可以(如果可能的话)重新确定你的代码,以便在变式声明之前再作一次发言。

例1:

CGRect newRect = CGRectZero;
switch( var ) {
  case 0:
    // do some stuff
    break;
  case 1:
  default:
    newRect = [someVar someMethodThatReturnsARect];
    // other code
    break;
}

例2:

switch( var ) {
  case 0:
    // do some stuff
    break;
  case 1:
  default: {
    CGRect newRect = [someVar someMethodThatReturnsARect];
    // other code
    break;
  }
}

例3:

switch( var ) {
  case 0:
    // do some stuff
    break;
  case 1:
  default:
    // some code re-ordered to here
    CGRect newRect = [someVar someMethodThatReturnsARect];
    // rest of the other code
    break;
}

Answer 2

Just checked Kernighan&Ritchie for this. In the C specification is no line describing that a declaration in the the first statement of a case is not allowed.

然而,大多数人认为,在某一案件中不宣布价值观是好的。

I think that the b) issue from EXC_BAD_ACCESS in statement block in Switch impact on imageViewPoistion is related to the same bug.

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