012-自定义左右 按钮 btn

//  首页 定位
- (void)customLeftBarButtonItem {
    UIButton *leftButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 80, 35)];
    [leftButton addTarget:self action:@selector(leftBarButtonItemEvent:) forControlEvents:UIControlEventTouchUpInside];
    [leftButton setImage:[UIImage imageNamed:@"location_icon"] forState:UIControlStateNormal];
    [leftButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    leftButton.titleLabel.font = [UIFont systemFontOfSize:14.0];
    leftButton.titleLabel.textAlignment = NSTextAlignmentLeft;
    self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:leftButton];
    self.leftButton = leftButton;
}

// 搜索
- (void)customRightBarButtonItem {
    UIButton *rightButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 22, 21)];
    [rightButton addTarget:self action:@selector(rightButtonItemEvent:) forControlEvents:UIControlEventTouchUpInside];
    [rightButton setImage:[UIImage imageNamed:@"search_icon"] forState:UIControlStateNormal];
    [rightButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    UIBarButtonItem *rightBtn = [[UIBarButtonItem alloc]initWithCustomView:rightButton];
    
    self.navigationItem.rightBarButtonItem = rightBtn;
}