尽管现在我试图寻找大约两个小时的解决方案，但我完全失去了这一点：
Valgrind正在吐出大量1的无效读取和使用此代码无效写入大小1，我无法弄清楚如何修复它。
char *movieGetDirector(const movie *m)
{
char *tmp = NULL ;
tmp = malloc(strlen(m->director)+1) ;
strcpy(tmp, m->director) ;
return tmp ;
}
在使用strlen的行上获取大小为1的无效读取，然后在strcpy行上写入无效的写入。我知道m-＆gt; director绝对是一个字符串，因为用gdb测试它会发现它是一个字符串而且它有文本。 google上针对此错误的所有解决方案都涉及到没有那个+1，但我有它在那里，它仍然是一个问题。我该如何解决这个问题？
答案 0 :(得分：2)
你的malloc / strlen / strcpy调用看起来很好。设置 func sendText(stext: NSMutableAttributedString) {
dispatch_async(dispatch_get_main_queue()) {
let range:NSRange = NSMakeRange(0, stext.length)
stext.enumerateAttributesInRange(range, options: NSAttributedStringEnumerationOptions.init(rawValue: 0), usingBlock: { (dic: [String:AnyObject]?, rang:NSRange!, stop: UnsafeMutablePointer<ObjCBool>) -> Void in
self.attachement = dic as NSDictionary!
self.attachement.enumerateKeysAndObjectsUsingBlock({ (key:AnyObject?, obj:AnyObject?, stop:UnsafeMutablePointer<ObjCBool>) -> Void in
let stri = key as! NSString!
if stri == "NSAttachment"{
let att:NSTextAttachment = obj as! NSTextAttachment
if att.image == nil{
print("no image")
}else{
var im:UIImage = att.image!
print("image exists")
if im.size.height > 340 && im.size.width > 272 {
let heightScale: CGFloat = self.textView.frame.size.height / im.size.height
let widthScale: CGFloat = self.textView.frame.size.width / im.size.width
if heightScale < widthScale {
let height = im.size.height * heightScale * 0.7
let width = im.size.width * heightScale * 0.7
UIGraphicsBeginImageContext(CGSizeMake(width, height))
im.drawInRect(CGRectMake(0, 0, width, height))
im = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
} else {
let height = im.size.height * widthScale * 0.7
let width = im.size.width * widthScale * 0.7
UIGraphicsBeginImageContext(CGSizeMake(width, height))
im.drawInRect(CGRectMake(0, 0, width, height))
im = UIGraphicsGetImageFromCurrentImageContext()
UIGraphicsEndImageContext()
}
}
self.lastRange = rang.location
self.finalForWatch.append(NSAttributedString(attributedString: stext.attributedSubstringFromRange(NSMakeRange(0, rang.location))))
self.finalForWatch.append(im)
}
}
if self.lastRange == 0 {
self.finalForWatch.append(stext)
} else {
self.finalForWatch.append(NSAttributedString(attributedString: stext.attributedSubstringFromRange(NSMakeRange(1, stext.length-1))))
}
})
})
let data: NSData = NSKeyedArchiver.archivedDataWithRootObject(self.finalForWatch)
let applicationDict = ["done" : data]
let documentDirectoryURL = try! NSFileManager.defaultManager().URLForDirectory(.DocumentDirectory, inDomain: .UserDomainMask, appropriateForURL: nil, create: true)
let fileDestinationUrl = documentDirectoryURL.URLByAppendingPathComponent("file.txt")
do{
try data.writeToURL(fileDestinationUrl, atomically: true)
} catch let error as NSError {
print("error writing to url \(fileDestinationUrl)")
print(error.localizedDescription)
}
self.session?.transferFile(fileDestinationUrl, metadata: nil)
}
}
和m m字段的代码很可能是错误的并且内存已损坏。你应该仔细检查那个变量的分配位置＆amp;初始化。
说，你的功能似乎是复制现有的strdup功能。所以你可能想写：
director