小编iOS*_*dev的帖子

是否可以播放系统蜂鸣声警报声.我不想将声音文件添加到我的资源包中,我想访问苹果系统声音并在需要的地方播放.

我有可编辑的tableview单元格,当我从表格中的第一个文本字段移动到最后一个文本字段时,它正在崩溃.代码是.下面的代码用于textfield委托

-(void)textFieldDidBeginEditing:(UITextField *)sender
{
   NSIndexPath *indexpath = [NSIndexPath indexPathForRow:sender.tag inSection:1];
    EditableTextFieldCell *cell = (EditableTextFieldCell *)[self.documentdetailTable cellForRowAtIndexPath:indexpath];
    self.actField = cell.textFieldOne;
    if([self.actField canBecomeFirstResponder]){
        [self.actField becomeFirstResponder];
    }
}
 -(BOOL)textFieldShouldEndEditing:(UITextField *)textField
{
   if (self.actField == textField) {
      [self.actField resignFirstResponder];
    }
    return YES;
}
-(void)textFieldDidEndEditing:(UITextField*)sender
{
if (self.quantityValue !=nil)
        {
            [self.quantityArray replaceObjectAtIndex:[sender tag] withObject:sender.text];
            [[self.documentItemsArray objectAtIndex:[sender tag]] setQUANTITY:[NSNumber numberWithDouble:[sender.text doubleValue]]];
            [self.documentdetailTable reloadData];
        }
}
- (BOOL)textFieldShouldClear:(UITextField *)textField {
self.quantityValue=@"";
return YES;
}
- (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    [textField resignFirstResponder];
    return YES;
}
-(void)textFieldDidChange:(UITextField *)theTextField
{
    NSLog( …