[IOS]設定NavigationController的ButtonItem方式

方法一

UIButton *backBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect];


[backBtn setTitle:@"返回" forState:UIControlStateNormal];


backBtn.frame = CGRectMake(0, 0, 40, 40);


[backBtn addTarget:self action:@selector(GoTop) forControlEvents:UIControlEventTouchUpInside];


UIBarButtonItem *layerBtnItem = [[UIBarButtonItem alloc] initWithCustomView:backBtn];


self.navigationController.navigationBar.topItem.leftBarButtonItem = layerBtnItem;


方法二

UIButton *backBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect];


[backBtn setTitle:@"返回" forState:UIControlStateNormal];


backBtn.frame = CGRectMake(0, 0, 40, 40);


[backBtn addTarget:self action:@selector(GoTop) forControlEvents:UIControlEventTouchUpInside];


UIBarButtonItem *layerBtnItem = [[UIBarButtonItem alloc] initWithCustomView:backBtn];

self.navigationController.navigationItem.leftBarButtonItem=layerBtnItem;