【代码笔记】iOS-MBProgressHUDDemo

一，工程图。

二，代码。

RootViewController.h

#import <UIKit/UIKit.h>
//加入头文件
#import "MBProgressHUD.h"

@interface RootViewController : UIViewController
<MBProgressHUDDelegate> {
    MBProgressHUD *HUD;
}

@end

RootViewController.m

#import "RootViewController.h"
//加入头文件
#import <unistd.h>

@interface RootViewController ()

@end

@implementation RootViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view.

    //转动3s后停止
    HUD = [[MBProgressHUD alloc] initWithView:self.navigationController.view];
    HUD.delegate = self;
    [HUD showWhileExecuting:@selector(myTask) onTarget:self withObject:nil animated:YES];
    [self.navigationController.view addSubview:HUD];

}
//等待3s
- (void)myTask {
    sleep(3);
}