为什么我会一个接一个地拥有这样的BarButton？

Question

嗨！我使用过UIBarButton Image但是我有这样的问题。我的意思是背面的图像+按钮。因为我已经编写了下面的代码。

UIBarButtonItem * btnMap = [[UIBarButtonItem alloc] initWithImage：[UIImage imageNamed：@“mapbutton.png”] style：UIBarButtonItemStylePlain target：self action：@selector（btnMapClicked :)];     self.navigationItem.rightBarButtonItem = btnMap;     [btnMap发布];

Answer 1

使用initWithCustomView并将UIButton设置为customView：

UIButton *subBtn = [UIButton buttonWithType:UIButtonTypeCustom];
subBtn.frame = CGRectMake(0, 0, 50, 40);  //adjust as needed
[subBtn setImage:[UIImage imageNamed:@"mapbutton.png"] forState:UIControlStateNormal];
[subBtn addTarget:self action:@selector(btnMapClicked:) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *btnMap = [[UIBarButtonItem alloc] initWithCustomView:subBtn];
self.navigationItem.rightBarButtonItem = btnMap; 
[btnMap release];

请注意，btnMapClicked：中的发件人现在将是UIButton而不是UIBarButtonItem。