Objective c 获取N错误代码中的错误

我在这段代码中遇到错误；我已将错误消息放在评论中。我想不出来

提前谢谢

#import <Foundation/Foundation.h>

int main (int argc, const char * argv[])
{

    @autoreleasepool {

        NSMutableString *str = [[NSMutableString alloc]init];
        for (int i = 0; i < 10; i++) {
        [str appendString:@"Aaron is cool!\n"];
        }

        // Declare a pointer to an NSError object, but don't instantiate it.
        // The NSError instance will only be created if there is, in fact, an error.
        NSError *error = nil;

        // Pass the error pointer by reference to the NSString method
        BOOL success =[str writeToFile:@"/tmp/cool.txt"; // Expected "]"
          atomically:YES // Bad receiver type 'int'
            encoding:NSUTF8StringEncoding 
               error:&error];

        // Test the returned BOOL, and query the NSError if the write failed
        if (success) {
        NSLog(@"done writing /tmp/cool.txt");
        } else {
        NSLog(@"writing /tmp/cool/txt failed:@", error localizedDescription); //    Expected ')'
        }

    }
    return 0;
}

#导入
int main（int argc，const char*argv[]
{
@自动释放池{
NSMutableString*str=[[NSMutableString alloc]init]；
对于（int i=0；i<10；i++）{
[str appendString:@“亚伦很酷！\n”]；
}
//声明指向NSError对象的指针，但不要实例化它。
//只有在事实上存在错误时，才会创建NSError实例。
n错误*错误=nil；
//通过引用将错误指针传递给NSString方法
BOOL success=[str writeToFile:@”/tmp/cool.txt；//应为“]
原子性：是//接收器类型“int”错误
编码：NSUTF8StringEncoding
错误：&错误]；
//测试返回的BOOL，如果写入失败，则查询NSError
如果（成功）{
NSLog（@“完成写入/tmp/cool.txt”）；
}否则{
NSLog（@“写入/tmp/cool/txt失败：@”，错误本地化描述）；//预期''
}
}
返回0；
}

如果您的代码没有任何打字错误，这就是问题所在

// Pass the error pointer by reference to the NSString method
        BOOL success =[str writeToFile:@"/tmp/cool.txt"; // Expected "]"
          atomically:YES // Bad receiver type 'int'
            encoding:NSUTF8StringEncoding 
               error:&error];

从这里删除分号“；”

BOOL success =[str writeToFile:@"/tmp/cool.txt"; // Expected "]"

试试这个：

@autoreleasepool {
    NSMutableString *str = [[[NSMutableString alloc]init] autorelease];
    for (int i = 0; i < 10; i++) {
        [str appendString:@"Aaron is cool!\n"];
    }
    NSError *error = nil;
    BOOL success =[str writeToFile:@"/tmp/cool.txt"
                        atomically:YES
                          encoding:NSUTF8StringEncoding 
                             error:&error];
    if (success) {
        NSLog(@"done writing /tmp/cool.txt");
    } else {
        NSLog(@"writing /tmp/cool/txt failed: %@", [error localizedDescription]); 
    }

}
return 0;

@autoreleasepool{
NSMutableString*str=[[[NSMutableString alloc]init]自动释放]；
对于（int i=0；i<10；i++）{
[str appendString:@“亚伦很酷！\n”]；
}
n错误*错误=nil；
BOOL success=[str writeToFile:@/tmp/cool.txt”
原子论：是的
编码：NSUTF8StringEncoding
错误：&错误]；
如果（成功）{
NSLog（@“完成写入/tmp/cool.txt”）；
}否则{
NSLog（@“写入/tmp/cool/txt失败：%@，[error localizedDescription]）；
}
}
返回0；