怎么在NavigationBar加left峻仇，這些控件本身只能在固定位置上
寫入代碼
UIImage* backImage = [UIImage imageNamed:@"nav_order_more"];
CGRect backframe = CGRectMake(0,0,30,8);
UIButton* backButton= [[UIButton alloc] initWithFrame:backframe];
[backButton setBackgroundImage:backImage forState:UIControlStateNormal];
backButton.titleLabel.font=[UIFont systemFontOfSize:13];
[backButton addTarget:self action:@selector(doClickBackAction) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem* setRightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];
self.navigationItem.rightBarButtonItem = setRightBarButtonItem;
-
UIImage -> UIButton -> UIBarButtonItem -> self.navigationItem(邏輯)
- UIBarButtonItem 是一個(gè)類
- 通過
initWithCustomView方法疫衩，實(shí)現(xiàn)UIButton -> UIBarButtonItem
怎么在navigationBar加個(gè) Center,這些控件本身只能在固定位置上
JRSegmentControl *segment = [[JRSegmentControl alloc] initWithFrame:CGRectMake(0, 0, self.itemWidth * self.viewControllers.count, self.itemHeight) titles:self.titles];
segment.backgroundColor = self.segmentBgColor;
segment.indicatorViewColor = self.indicatorViewColor;
segment.delegate = self;
self.navigationItem.titleView = segment;
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JRSegmentControl -> self.navigationItem.titleView
- 通過賦值的方式 self.navigationItem.titleView = segment;
如何在navigationBar在任意位置加控件
UISegmentedControl * contorl = [[UISegmentedControl alloc] initWithItems:@[@"全部",@"待收貨",@"待評價(jià)"]];
contorl.frame = CGRectMake([UIScreen mainScreen].bounds.size.width/2-150/2, 2, 150, 40);
[contorl addTarget:self action:@selector(clickSegment:) forControlEvents:UIControlEventValueChanged];
//默認(rèn)選擇為第一個(gè)
contorl.selectedSegmentIndex = 0;
[self.navigationController.navigationBar addSubview:contorl];
UISegmentedControl -> self.navigationController.navigationBar
-
通過addSubView的方式
- [self.navigationController.navigationBar addSubview:contorl];
總結(jié)：導(dǎo)航欄上只能加UIBarButtonItem，不能直接加控件
