怎么给uibarbuttonitem添加点击方法

UIImage* backImage = [UIImage imageNamed:@"btn_back.png"]

CGRect backframe = CGRectMake(0,0,54,30)

UIButton* backButton= [[UIButton alloc] initWithFrame:backframe]

[backButton setBackgroundImage:backImage forState:UIControlStateNormal]

[backButton setTitle:@"直播" forState:UIControlStateNormal]

backButton.titleLabel.font=[UIFont systemFontOfSize:13]

[backButton addTarget:self action:@selector(doClickBackAction:)forControlEvents:UIControlEventTouchUpInside]

UIBarButtonItem* leftBarButtonItem = [[UIBarButtonItem alloc]initWithCustomView:backButton]

UIBarButtonItem* leftBarButtonItem = [[UIBarButtonItem alloc] init]

self.navigationItem.leftBarButtonItem = leftBarButtonItem

[leftBarButtonItem release]

[backButton release]

如果只是想看不到这个UIBarButtonItem,只需要将其设置成nil,要的时候再重新赋值上去.

如果是想隐藏整个toolBa则需要对空上toolBar进行hidden *** 作.

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