ios之如何设置没有边框的 UIBarButtonItem

我用 barbutton 创建了如下 View

self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"settingsicon.png"] style:UIBarButtonItemStylePlain target:self action:@selector(settingsButtonClicked:)]; 

请您参考如下方法:

用这个 :

UIBarButtonItem *barButton= [[UIBarButtonItem alloc] initWithCustomView:customButton]; 

// GRAPHICAL BUTTON FRAMEWORK 
     UIButton* btton = [UIButton buttonWithType:UIButtonTypeCustom]; 
     [btton setFrame:CGRectMake(0, 0, 30, 30)]; 
     [btton addTarget:self action:@selector(SOMEROUTINE) forControlEvents:UIControlEventTouchUpInside]; 
     [btton setImage:[UIImage imageNamed:@"SOME IMAGE"] forState:UIControlStateNormal]; 
     UIBarButtonItem* barButton = [[UIBarButtonItem alloc] initWithCustomView:btton];