缩小自定义导航栏按钮之间的距离 修改导航栏按钮图片的颜色不用系统的颜色

UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 

btn.frame= CGRectMake(0, 0, 40, 44);  

[btn addTarget:self action:@selector(buttonClicked) forControlEvents:UIControlEventTouchUpInside];  

UIBarButtonItem *btn_right = [[UIBarButtonItem alloc] initWithCustomView:btn];  

UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc]   initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace   target:nil action:nil];  

/**

width为负数时，相当于btn向右移动width数值个像素，由于按钮本身和  边界间距为5pix，所以width设为-5时，间距正好调整为0；width为正数 时，正好相反，相当于往左移动width数值个像素

*/

negativeSpacer.width = -5;   

self.navigationItem.rightBarButtonItems = [NSArray arrayWithObjects:negativeSpacer, btn_right, nil];

千万不要设置tintcolor

UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];

    btn.frame= CGRectMake(0, 0, 30, 44);

    [btn setImage:[[UIImage imageNamed:@"search"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal] forState:UIControlStateNormal];

    [btn addTarget:self action:@selector(search) forControlEvents:UIControlEventTouchUpInside];

UIBarButtonItem *itemRight = [[UIBarButtonItem alloc] initWithCustomView:btn];

UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc]   initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];

    negativeSpacer.width = -10;

self.navigationItem.rightBarButtonItems = @[negativeSpacer,itemRight];