我使用以下代码将UISegmentedControl和UIBarButtonItem放入UIToolBar中:UISegmentedControl*prevNext=[[UISegmentedControlalloc]initWithItems:[[NSArrayalloc]initWithObjects:@"Previous",@"Next",nil]];prevNext.segmentedControlStyle=UISegmentedControlStyleBar;[prevNextaddTarget:selfaction:@selector(prevNextPressed)fo