确定UITextView中起始光标的位置

    self.iContextText = [[UITextView alloc] initWithFrame:CGRectMake(5, 5, self.view.frame.size.width-20, 110)];

    self.iContextText.textColor = [UIColor lightGrayColor];

    self.iContextText.delegate = self;

    self.iContextText.font = [UIFont systemFontOfSize:14];

    self.iContextText.selectedRange=NSMakeRange(0,0);

    self.iContextText.contentOffset = CGPointMake(0, 0);

以下一行代码即可实现控制光标位置：

self.iContextText.contentInset = UIEdgeInsetsMake(-70, 0, 0, 0);