放张大图...bounds的控制没有效果.. about uinavigation-sxfixspace HOT 2 CLOSED

UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];
[button addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];

[button setImage:[nomalImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal] forState:UIControlStateNormal];
if (higeLightedImage) {
    [button setImage:higeLightedImage forState:UIControlStateHighlighted];
}
[button sizeToFit];
if (button.bounds.size.width < 40) {
    CGFloat width = 40 / button.bounds.size.height * button.bounds.size.width;
    button.bounds = CGRectMake(0, 0, width, 40);
}
if (button.bounds.size.height > 40) {
    CGFloat height = 40 / button.bounds.size.width * button.bounds.size.height;
    button.bounds = CGRectMake(0, 0, 40, height);
}
button.imageEdgeInsets = imageEdgeInsets;
return [[UIBarButtonItem alloc] initWithCustomView:button];