UIPicker崩溃

Question

如果对象的UIPicker大于3，则我的NSArray崩溃，并出现以下错误：

由于未捕获的异常'NSInvalidArgumentException'而终止应用程序，原因：' - [NSAutoreleasePool pickerView：titleForRow：forComponent：]：发送到实例的无法识别的选择器

这是我的函数代码：

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

  self.glassPickerOptions = [[NSArray alloc] initWithObjects:@"3mm",@"4mm",@"DG4+4",@"DG4+6",nil];
  [glassPicker setFrame:CGRectMake(0, 0, 320, 162)];
  [glassPicker selectRow:1 inComponent:0 animated:NO];
}

- (NSInteger) numberOfComponentsInPickerView:(UIPickerView *)pickerView 
{
    return 1;
}

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
    NSInteger glassPickerOptionsCount = self.glassPickerOptions.count;
    NSLog(@"%i", glassPickerOptionsCount);
    return glassPickerOptionsCount;
}

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
    return (NSString*) [self.glassPickerOptions objectAtIndex:row];
}

希望我没有错过任何事情。提前致谢

Answer 1

你似乎过度发布你的选择器视图，你可以看到这个，因为邮件被发送到autoreleasepool而不是你期望的对象，你应该检查你的选择器的保留/发布，看看发生了什么，真的不能从发布的代码中说出来......