【代碼筆記】iOS-在導覽列中顯示等待對話方塊，ios-導覽列

【代碼筆記】iOS-在導覽列中顯示等待對話方塊，ios-導覽列

一，。

二，代碼。

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.        //在導覽列中顯示等待對話方塊    [self showActivityIndicatorViewInNavigationItem];    }//點擊任何處，停止等待指標-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{        //停止等待指標，恢複導覽列    self.navigationItem.titleView = nil;    self.navigationItem.prompt = nil;}#pragma -mark -functions//在導覽列中顯示等待對話方塊-(void) showActivityIndicatorViewInNavigationItem{    UIActivityIndicatorView *aiview = [[UIActivityIndicatorView alloc]                                       initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];    self.navigationItem.titleView = aiview;    [aiview startAnimating];    self.navigationItem.prompt = @"資料載入中...";}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end