导航栏的UIBarButtonItem的位置调整，（需求来的太突然）

来源：互联网发布：unity3d 动画系统编辑：程序博客网时间：2024/04/29 13:30

界面的导航栏距离边界感觉有点圆，然后就找了一下怎么修改间隙文字到边界的距离，果然找到了。

 UIButton *btn = [UIButton buttonWithType:UIButtonTypeRoundedRect];    /**     *  设置frame只能控制按钮的大小     */    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];

只需要自己修改一下即可，不过嘛，还是得做点什么，方便嘛！

#import <UIKit/UIKit.h>/** *  导航item的扩展 */@interface UIBarButtonItem (Extension)+ (UIBarButtonItem *)itemWithTarget:(id)target action:(SEL)action image:(UIImage *)image highImage:(UIImage *)highImage;@end

#import "UIBarButtonItem+Extension.h"@implementation UIBarButtonItem (Extension)/** *  创建一个item * *  @param target    点击item后调用哪个对象的方法 *  @param action    点击item后调用target的哪个方法 *  @param image     图片 *  @param highImage 高亮的图片 *  @return 创建完的item */+ (UIBarButtonItem *)itemWithTarget:(id)target action:(SEL)action image:(UIImage *)image highImage:(UIImage *)highImage{    UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];    [btn addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];    //设置图片//    [btn setImage:[UIImage imageNamed:image] forState:UIControlStateNormal];//    [btn setImage:[UIImage imageNamed:highImage] forState:UIControlStateHighlighted];    [btn setImage:image forState:UIControlStateNormal];    [btn setImage:highImage forState:UIControlStateHighlighted];    // 设置尺寸    btn.size = CGSizeMake(40, 40);//    btn.size = btn.currentImage.size;    return [[UIBarButtonItem alloc] initWithCustomView:btn];}@end

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