UIViewController一般有點擊UINavigationController左上角返回按鈕關(guān)閉和向右滑動關(guān)閉兩種方式.

但若定義了UINavigationController的leftBarButtonItem后，UIVIewController是無法再滑動返回的.

不過，如果加上下面這句，便可以自定義LeftBarButtonItem后，仍然可以實現(xiàn)滑動關(guān)閉ViewController的功能:

self.navigationController.interactivePopGestureRecognizer.delegate=nil;

以下是一個完整的例子:

UIButton* button = [[UIButtonalloc]initWithFrame:CGRectMake(0,0,60,60)];

[buttonsetImage:[UIImageimageNamed:@"btn_back_white"]forState:UIControlStateNormal];

[buttonaddTarget:selfaction:@selector(onBackClick)forControlEvents:UIControlEventTouchUpInside];

UIBarButtonItem* backButton = [[UIBarButtonItemalloc]initWithCustomView:button];

self.navigationItem.leftBarButtonItem= backButton;

self.navigationController.interactivePopGestureRecognizer.delegate=nil;