这个第三方和MBProgressHUD差不多,也挺简单的。

////  ViewController.m//  ProgressHUD////  Created by City--Online on 15/6/15.//  Copyright (c) 2015年 City--Online. All rights reserved.//#import "ViewController.h"#import "SVProgressHUD.h"@interface ViewController ()@end@implementation ViewController- (void)viewWillAppear:(BOOL)animated {    [super viewWillAppear:animated];        [[NSNotificationCenter defaultCenter] addObserver:self                                             selector:@selector(handleNotification:)                                                 name:SVProgressHUDWillAppearNotification                                               object:nil];        [[NSNotificationCenter defaultCenter] addObserver:self                                             selector:@selector(handleNotification:)                                                 name:SVProgressHUDDidAppearNotification                                               object:nil];        [[NSNotificationCenter defaultCenter] addObserver:self                                             selector:@selector(handleNotification:)                                                 name:SVProgressHUDWillDisappearNotification                                               object:nil];        [[NSNotificationCenter defaultCenter] addObserver:self                                             selector:@selector(handleNotification:)                                                 name:SVProgressHUDDidDisappearNotification                                               object:nil];}- (void)handleNotification:(NSNotification *)notif{    NSLog(@"Notification recieved: %@", notif.name);    NSLog(@"Status user info key: %@", [notif.userInfo objectForKey:SVProgressHUDStatusUserInfoKey]);}- (void)viewDidLoad {    [super viewDidLoad];    UIButton *btn=[UIButton buttonWithType:UIButtonTypeSystem];    [btn setTitle:@"提示框" forState:UIControlStateNormal];    btn.frame=CGRectMake(20, 100, 100, 100);    [btn addTarget:self action:@selector(btnClick:) forControlEvents:UIControlEventTouchUpInside];    [self.view addSubview:btn];}-(void)btnClick:(id)sender{    //    [SVProgressHUD showWithStatus:@"Loading"];//    [SVProgressHUD show];//    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{//        sleep(3);//        dispatch_async(dispatch_get_main_queue(), ^{//            [SVProgressHUD dismiss];//        });//    });    //    [self showWithProgress];        [self showSuccess];}static float progress = 0.0f;- (void)showWithProgress {    progress = 0.0f;    [SVProgressHUD showProgress:0 status:@"Loading"];    [self performSelector:@selector(increaseProgress) withObject:nil afterDelay:0.3f];}- (void)increaseProgress {    progress+=0.1f;    [SVProgressHUD showProgress:progress status:@"Loading"];        if(progress < 1.0f)        [self performSelector:@selector(increaseProgress) withObject:nil afterDelay:0.3f];    else        [self performSelector:@selector(dismiss) withObject:nil afterDelay:0.4f];}- (void)dismiss {    [SVProgressHUD dismiss];}- (void)showInfo{    [SVProgressHUD showInfoWithStatus:@"Useful Information."];}- (void)showSuccess {    [SVProgressHUD showSuccessWithStatus:@"Great Success!"];}- (void)showError {    [SVProgressHUD showErrorWithStatus:@"Failed with Error"];}- (void)didReceiveMemoryWarning {    [super didReceiveMemoryWarning];    // Dispose of any resources that can be recreated.}@end