一。自定義navigationbaride
- (void)initNavigationBar{ [self.navigationController setNavigationBarHidden:YES]; UINavigationBar *bar = [[UINavigationBar alloc] initWithFrame:CGRectMake(0, 0, 320, 32)]; [bar setBackgroundImage:[UIImage imageNamed:@"zhuche_bar2.png"] forBarMetrics:UIBarMetricsDefault]; UINavigationItem *item = [[UINavigationItem alloc] initWithTitle:nil]; UIButton *left = [UIButton buttonWithType:UIButtonTypeCustom]; [left setFrame:CGRectMake(0, 2, 28, 28)]; [left setImage:[UIImage imageNamed:@"zhuche_back.png"] forState:UIControlStateNormal]; [left addTarget:self action:@selector(back) forControlEvents:UIControlEventTouchUpInside]; UIBarButtonItem *leftButton = [[UIBarButtonItem alloc] initWithCustomView:left]; [item setLeftBarButtonItem:leftButton]; [bar pushNavigationItem:item animated:NO]; [self.view addSubview:bar]; } - (void)back{ [self.navigationController popViewControllerAnimated:YES]; }
雖然能夠解決自定義navigationbar的問題,左右按鈕均可以替換,可是若是放在UITableViewController中,自定義的navigationbar會隨着scrollview的滑動而滑動,不會像系統自帶的navigationbar同樣始終保持在屏幕最上方。那麼咱們能夠有第二種解決方式,修改原來的navigationbar,其實就是改一下leftBarButtonItem或者rightBarButtonItem在navigationbar上面的位置:修改UIBarButtonItem 的邊距。測試
二。修改UIBarButtonItem 的邊距spa
@interface UINavigationItem (margin) @end @implementation UINavigationItem (margin) #if __IPHONE_OS_VERSION_MAX_ALLOWED > __IPHONE_6_1 - (void)setLeftBarButtonItem:(UIBarButtonItem *)_leftBarButtonItem { if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0) { UIBarButtonItem *negativeSeperator = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil]; negativeSeperator.width = -16;//此處修改到邊界的距離,請自行測試 if (_leftBarButtonItem) { [self setLeftBarButtonItems:@[negativeSeperator, _leftBarButtonItem]]; } else { [self setLeftBarButtonItems:@[negativeSeperator]]; } } else { [self setLeftBarButtonItem:_leftBarButtonItem animated:NO]; } } - (void)setRightBarButtonItem:(UIBarButtonItem *)_rightBarButtonItem { if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0) { UIBarButtonItem *negativeSeperator = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil]; negativeSeperator.width = -12;//此處修改到邊界的距離,請自行測試 if (_rightBarButtonItem) { [self setRightBarButtonItems:@[negativeSeperator, _rightBarButtonItem]]; } else { [self setRightBarButtonItems:@[negativeSeperator]]; } } else { [self setRightBarButtonItem:_rightBarButtonItem animated:NO]; } } #endif @end
以上代碼能夠放置在主視圖控制器的.m文件裏面,@implementation ViewController的上面。.net
參考資料:http://blog.csdn.net/reylen/article/details/16338781;code
http://blog.163.com/lhl_soft/blog/static/201750004201292043750125/;orm