UITextField左边的图片

-(id)initWithFrame:(CGRect)frame Icon:(UIImageView*)icon
{
    self = [super initWithFrame:frame];
    if (self) {
        self.leftView = icon;
        self.leftViewMode = UITextFieldViewModeAlways;
    }
    return self;
}

-(CGRect) leftViewRectForBounds:(CGRect)bounds {
    CGRect iconRect = [super leftViewRectForBounds:bounds];
    iconRect.origin.x += 10;// 右偏10
    return iconRect;
}