IOS UITextField 設置光標位置

 textField.leftView = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, 8, 0)] autorelease];
 textField.leftView.userInteractionEnabled = NO;
 textField.leftViewMode = UITextFieldViewModeAlways;

// Text 垂直居中
textField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;