iOS button 同时设定图片和文字

#pragma mark 定位城市

- (void)addCurrentCityBtn {

    _btnCity = [UIButton buttonWithType:UIButtonTypeCustom];

    _btnCity.frame = CGRectMake(0, 0, 70, 30);

    [_btnCity addTarget:self action:@selector(showCurrentCity:) forControlEvents:UIControlEventTouchUpInside];

    [_btnCity setTitle:@"上海市" forState:UIControlStateNormal];

    _btnCity.titleLabel.font = [UIFont systemFontOfSize:14];

    [_btnCity setTitleColor:kLightTintColor forState:UIControlStateNormal];

    

    [_btnCity setImage:[UIImage imageNamed:@"map.png"] forState:UIControlStateNormal];

    _btnCity.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;

    [_btnCity setTitleEdgeInsets:UIEdgeInsetsMake(0, 5, 0, 0)];

    

    UIBarButtonItem *rightBtnItem = [[UIBarButtonItem alloc] initWithCustomView:_btnCity];

    self.navigationItem.leftBarButtonItem = rightBtnItem;

}