0

如果我同时旋转 2 个组件，以下代码会导致崩溃，有时取决于选择了哪些数组，这些值将超出范围

我需要一些条件检查来阻止崩溃，但不知道怎么做

谁能建议合适的代码来处理这种情况以避免崩溃

谢谢

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{

    // Only calls the following code if component "0" has changed.
        if (component == 0) 
        {

            // Sets the global integer "component0Row" to the currently selected row of component "0"
            component0Row  = row;

            // Loads the new values for the selector into a new array in order to reload the data.
            NSDictionary *newDict = [[NSDictionary alloc]initWithDictionary:[pickerData objectForKey:[Letters objectAtIndex:component0Row]]];

            NSArray *sortArray = [[NSArray alloc]initWithArray:[newDict allKeys]];

            NSMutableArray *newValues = [[NSMutableArray alloc]initWithArray:[sortArray sortedArrayUsingSelector:@selector(localizedStandardCompare:)]];

            self.Numbers = newValues;

            component1Row = 0;
            [self.myPicker selectRow:0 inComponent:1 animated:NO];

            [newDict release];
            [sortArray release];
            [newValues release];
        }
        if(component ==1)
        {
            component0Row = [pickerView selectedRowInComponent:0];
            component1Row =row;
        }
}
4

1 回答 1

0

问题可能出在titleForRow方法或numberOfRows方法上。您必须确保您没有超出相关数组的范围。

于 2011-10-22T14:41:39.650 回答