如何按鈕添加到UINavigationBar的

Question

我需要的東西就是這樣的 http://anishusite.appspot.com/hbimgs/Bills220.png

能夠改變從導航欄的日期......這怎麼辦呢？ 我嘗試添加與古都按鈕的工具欄，並與日期標籤的視圖，但它不工作得很好

http://osmorphis.blogspot.ro/2009/05/multiple-buttons-on-navigation-bar.html

下面是代碼：

//first create the view 
UIView *titleView = [[UIView alloc] initWithFrame:CGRectMake(0, 6, 157, 33)]; 
[titleView setBackgroundColor:[UIColor clearColor]]; 

//add the buttons to the view 
UIButton *prevButton = [UIButton buttonWithType:UIButtonTypeCustom]; 
[prevButton setFrame:CGRectMake(0, 1, 32, 32)]; 
[prevButton setBackgroundImage:[UIImage imageNamed:@"36-circle-west"] forState:UIControlStateNormal]; 
[prevButton addTarget:self action:@selector(prevMonth) forControlEvents:UIControlEventTouchUpInside]; 
[titleView addSubview:prevButton]; 


UIButton *nextButton = [UIButton buttonWithType:UIButtonTypeCustom]; 
[nextButton setFrame:CGRectMake(145, 1, 32, 32)]; 
[nextButton setBackgroundImage:[UIImage imageNamed:@"20-circle-east"] forState:UIControlStateNormal]; 
[nextButton addTarget:self action:@selector(nextMonth) forControlEvents:UIControlEventTouchUpInside]; 
[titleView addSubview:nextButton]; 

[self.dateLabel setFrame:CGRectMake(33, 1, 90, 33)]; 
[self.dateLabel setBackgroundColor:[UIColor clearColor]]; 
[self.dateLabel setTextAlignment:UITextAlignmentCenter]; 

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 
[dateFormatter setDateStyle:NSDateFormatterNoStyle]; 
[dateFormatter setTimeStyle:NSDateFormatterNoStyle]; 
[dateFormatter setDateFormat:@"MMMM,YYYY"]; 
NSString *dateString = [dateFormatter stringFromDate:self.beginDate]; 
NSLog(@"the title date string: %@",dateString); 

[self.dateLabel setText:dateString]; 
[self.dateLabel setTextColor:[UIColor whiteColor]]; 
[self.dateLabel setBackgroundColor:[UIColor clearColor]]; 
[self.dateLabel setFont:[UIFont fontWithName:@"System" size:17.0]]; 

//create the toolbar itself 

UIToolbar *toolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 240, 44)]; 
[toolbar setBackgroundColor:[UIColor clearColor]]; 

NSMutableArray *items = [NSMutableArray arrayWithCapacity:3]; 

UIBarButtonItem *addButton = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(addTransaction)]; 
addButton.style = UIBarButtonItemStyleBordered; 


UIBarButtonItem *spacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:nil action:nil]; 

UIBarButtonItem *theView = [[UIBarButtonItem alloc] initWithCustomView:titleView]; 

[items addObject:theView]; 
[items addObject:spacer]; 
[items addObject:addButton]; 

[toolbar setItems:items animated:NO]; 

self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:toolbar]; 

http://www.shareimages.com/image.php?61601-qpyWmpSfk5.kmpyWmak-screen.png

正如你可以看到它看起來不太好。標籤不顯示...按鈕似乎只有上半挖掘工作。 （當拍了拍方法稱爲OK）......任何ideeas？ BTW導航欄有一個背景圖像，但是在工具欄覆蓋它。爲什麼？我有一個清晰的彩色背景製作工具欄....

Answer 1

UINavigationItem有titleview的財產。您可以將其設置爲您創建的任何視圖。因此，創建一個UIToolbar子與透明背景，添加您的按鈕和文本標籤，這一點，那麼：

self.navigationItem.titleView = myCustomView; 

其中myCustomView是包含您的箭頭按鈕和標籤的視圖。這種觀點可能是一個UIToolbar子類，創建一個UIToolbar子類，它是透明的，然後加上你的按鈕閱讀Couldn't UIToolBar be transparent?的招數：

柔性墊片，左箭頭，用疊UILabels，右箭頭自定義視圖，柔性墊片