Question

我有一个数组，我想用字典填充，但是当我尝试查看填充了数组的pickerView时，我得到了EXC_BAD_ACCESS。这3行代码中的一行导致了它。

paths = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) copy];
  NSString *documentsDirectory = [paths objectAtIndex:0]; 
  NSString *plistPath = [documentsDirectory stringByAppendingPathComponent:@"fullArray.plist"];

完整代码

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.


NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
NSString *documentsDirectory = [paths objectAtIndex:0]; 
NSString *plistPath = [documentsDirectory stringByAppendingPathComponent:@"fullArray.plist"];

dictionary = [[NSDictionary alloc] initWithContentsOfFile:plistPath];
array = [dictionary allKeys];

[pickerView selectRow:0 inComponent:0 animated:YES];
[pickerView reloadAllComponents];

}

Answer 1

也许NSSearchPathForDirectoriesInDomains返回的NSArray正在变成僵尸。您可以尝试获取它的副本：

NSArray *paths = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) copy];

Answer 2

看起来，通过这一行，您正在尝试将值保存到名为“数组”的ivar中：

array = [dictionary allKeys];

但这不会起作用（除非它和ARC项目，你说它不是）。

您需要保留该值。使数组成为保留（或复制）的属性。或者（不太好）自己保留它：

[array autorelease];  // Don't skip this, or it may leak.
array = [[dictionary allKeys] retain];

3行代码，一行导致EXC_BAD_ACCESS

2 个答案: