为UINavigationController添加UINavigationItem

 

 

UIBarButtonItem *leftBarButtonItem = [[UIBarButtonItem alloc]

initWithTitle:@"返回"

style:UIBarButtonSystemItemCancel

target:self

action:@selector(doClickBackAction:)];

self.navigationItem.backBarButtonItem = leftBarButtonItem;

 

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];