一，效果图。

二，代码。

ViewController.m

#import "ViewController.h"@interface ViewController () @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. //在导航栏中显示等待对话框 [self showActivityIndicatorViewInNavigationItem]; } //点击任何处，停止等待指示器 -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{ //停止等待指示器，恢复导航栏 self.navigationItem.titleView = nil; self.navigationItem.prompt = nil; } #pragma -mark -functions //在导航栏中显示等待对话框 -(void) showActivityIndicatorViewInNavigationItem { UIActivityIndicatorView *aiview = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite]; self.navigationItem.titleView = aiview; [aiview startAnimating]; self.navigationItem.prompt = @"数据加载中..."; } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end