Question

这是我见过的最奇怪的错误我正在创建一个从文本文件中加载级别的迷宫游戏，但如果文件有三行以上，它似乎会随机改变我的大多数变量。我加载一个文本文件然后遍历这些行，并根据其字母在适当的位置创建一个对象有什么建议吗？

文字档案：
TTTTTTTTTTTTTTTTT
TTTTTTTTTTTTTTTTT
TTTTTTTTTTTTTTTTT
TTTTTRPPGPPDTTTTT
TTTTTPTPTPTPTTTTT
TTTTTPPPWPPPTTTTT
TTTTTPTPPPTPTTTTT
TTTTTPPPTPPPTTTTT
TTTTTPTPPPTPTTTTT
TTTTTUPPPPPLTTTTT
TTTTTTTTPTTTTTTTT
TTTTTTTTBTTTTTTTT
TTTTTTTTPTTTTTTTT

NSString *path = [[NSBundle mainBundle] pathForResource:@"map2c" ofType:@"txt"];
NSString *contents = [NSString stringWithContentsOfFile:path encoding:NSASCIIStringEncoding error:nil];
NSArray *lines = [contents componentsSeparatedByCharactersInSet:[NSCharacterSet characterSetWithCharactersInString:@"\r\n"]];
int y  = 0;
for (NSString* line in lines) {

    NSString* ty = @"TBGWUDLRP";
    char *str = (char *)[line UTF8String];
    char *str2 = (char*)[ty UTF8String];
    grannyMoving = 2;
    int x = str2[0];
    char x2 = str2[1];
    char GrannyStr = str2[2];
    char wolfStr = str2[3];

    char UpStr = str2[4];
    char DownStr = str2[5];
    char leftStr = str2[6];
    char rightStr = str2[7];
    char PathStr = str2[8];
    y--;
    maxY = y;
    if (line.length) {
        maxI = line.length;
        for (int i = 0; i< line.length; i++) {                
 SKSpriteNode* tree = [SKSpriteNode spriteNodeWithImageNamed:@"tree3"];
            tree.physicsBody = [SKPhysicsBody bodyWithRectangleOfSize:CGSizeMake(31, 31)];
            tree.physicsBody.affectedByGravity = false;
            tree.physicsBody.dynamic = NO;
            tree.position = CGPointMake(64*i+20, 64*y+800);
            tree.zPosition = -1* tree.position.y;

Answer 1

来自documentation：

此C字符串是指向字符串对象内部结构的指针，它的寿命可能比字符串对象短，并且会肯定没有更长的寿命。因此，您应该复制C 如果需要将字符串存储在其中的内存上下文之外你使用这个属性。

要修复此问题，您必须复制UTF8String返回的字符。 This answer提供了两种解决方案。

XCODE从文件中读取文本会删除变量

1 个答案: