LoadingView.h
#import <Foundation/Foundation.h>

@class MBProgressHUD;

@interface LoadingView : NSObject

@property (nonatomic, retain) MBProgressHUD *HUD;

+ (LoadingView *)sharedInstance;

/**

 *  加载中提示框

 *

 *  @param title     标题

 *  @param superView 父View

 */

- (void)showLoadingViewWithTitle:(NSString *)title superView:(UIView *)superView;

/**

 *  加载中提示框

 *

 *  @param title     标题

 *  @param delay     关闭时间

 *  @param superView 父View

 */

- (void)showLoadingViewWithTitle:(NSString *)title afterDelay:(NSTimeInterval)delay superView:(UIView *)superView;

/**

 *  关闭提示框

 */

- (void)closeLoadingView;

@end

LoadingView.m
#import "LoadingView.h"

#import "MBProgressHUD.h"

@implementation LoadingView

@synthesize HUD;

static LoadingView *_shardLoadingView = nil;

+ (LoadingView *)sharedInstance

{

    if (_shardLoadingView == nil) {

        _shardLoadingView = [[LoadingView alloc]init];

    }

    return _shardLoadingView;

}

- (id)init

{

    self = [super init];

    if (self) {

         HUD = [[MBProgressHUD alloc] init];

    }

    return self;

}

- (void)showLoadingViewWithTitle:(NSString *)title superView:(UIView *)superView

{

    HUD.labelText = title;

    [superView addSubview:HUD];

    [superView bringSubviewToFront:HUD];

    [HUD show:YES];

}

- (void)showLoadingViewWithTitle:(NSString *)title afterDelay:(NSTimeInterval)delay superView:(UIView *)superView

{

    HUD.labelText = title;

    [superView addSubview:HUD];

    [superView bringSubviewToFront:HUD];

    [HUD show:YES];

    [HUD hide:YES afterDelay:delay];

}

- (void)closeLoadingView

{

    [HUD hide:YES];

}

@end

// 使用

 [[LoadingView sharedInstance]showLoadingViewWithTitle:@"加载中...." superView:self.view];