- (CGRect)textRectForBounds:(CGRect)bounds {

    CGRect inset = CGRectMake(bounds.origin.x + 40, bounds.origin.y, bounds.size.width -40, bounds.size.height);

    return inset;

}

- (CGRect)editingRectForBounds:(CGRect)bounds {

    //    return CGRectInset( bounds , 40 , 0 );

    CGRect inset = CGRectMake(bounds.origin.x + 40, bounds.origin.y, bounds.size.width -40, bounds.size.height);

    return inset;

}

- (CGRect)leftViewRectForBounds:(CGRect)bounds

{

    CGRect inset = CGRectMake(bounds.origin.x +10, bounds.origin.y + 7, 25, 25);

    return inset;

}

UILabel的方法 （字體加白色陰影）

- (void)drawTextInRect:(CGRect)rect {

    CGSize shadowOffset = self.shadowOffset;

    UIColor *textColor = self.textColor;

    CGContextRef c = UIGraphicsGetCurrentContext();

    CGContextSetLineWidth(c, 1);

    CGContextSetLineJoin(c, kCGLineJoinRound);

    CGContextSetTextDrawingMode(c, kCGTextStroke);

    self.textColor = [UIColor whiteColor];

    [super drawTextInRect:rect];

    CGContextSetTextDrawingMode(c, kCGTextFill);

    self.textColor = textColor;

    self.shadowOffset = CGSizeMake(0, 0);

    [super drawTextInRect:rect];  

    self.shadowOffset = shadowOffset; 

}

UIButton和UITextField類似