UITextField实现左侧空出一定的边距

就是通过uitextfield的leftview来实现的，同时要设置leftviewmode。

如果设置左右边距，需要再加上rightView功能

 

-(void)setTextFieldLeftPadding:(UITextField *)textField forWidth:(CGFloat)leftWidth
{CGRect frame = textField.frame;frame.size.width = leftWidth;UIView *leftview = [[UIView alloc] initWithFrame:frame];textField.leftViewMode = UITextFieldViewModeAlways;textField.leftView = leftview;
}