#import "AppDelegate+HUD.h"#import "MBProgressHUD.h"@implementation AppDelegate (HUD)// 获取当前处于activity状态的view controller- (UIViewController *)activityViewController{    UIViewController* activityViewController = nil;        UIWindow *window = [[UIApplication sharedApplication] keyWindow];        // 如果是模态控制器用这个方法获取    UIViewController *appRootVC = window.rootViewController;    UIViewController *topVC = appRootVC;    if (topVC.presentedViewController) {        topVC = topVC.presentedViewController;        return topVC;    }            if(window.windowLevel != UIWindowLevelNormal)    {        NSArray *windows = [[UIApplication sharedApplication] windows];        for(UIWindow *tmpWin in windows)        {            if(tmpWin.windowLevel == UIWindowLevelNormal)            {                window = tmpWin;                break;            }        }    }        NSArray *viewsArray = [window subviews];    if([viewsArray count] > 0)    {        UIView *frontView = [viewsArray objectAtIndex:0];                id nextResponder = [frontView nextResponder];                if([nextResponder isKindOfClass:[UIViewController class]])        {            activityViewController = nextResponder;        }        else        {            activityViewController = window.rootViewController;        }    }        return activityViewController;}/** * 因为网络请求是在异步线程中执行，只有主线程才可以更新UI */// 显示加载- (void) showHUD:(NSString *)msg{    dispatch_async(dispatch_get_main_queue(), ^{        if ([self.window viewWithTag:88888]) {            [[self.window viewWithTag:88888] removeFromSuperview];        }        MBProgressHUD *HUD = [[MBProgressHUD alloc] initWithView:self.window];        HUD.tag = 88888;        [self.window addSubview:HUD];        HUD.label.text = msg;        HUD.contentColor = [UIColor blackColor];        HUD.label.textColor = [UIColor colorWithRed:254.0/255 green:71.0/255 blue:67.0/255 alpha:1];        [HUD setUserInteractionEnabled:NO]; // 设置成非模态显示        [HUD showAnimated:YES];    });        }// 移除- (void) removeHUD{    dispatch_async(dispatch_get_main_queue(), ^{        [[self.window viewWithTag:88888] hideAnimated:YES];        [[self.window viewWithTag:88888] removeFromSuperViewOnHide];    });        }// 显示信息- (void) showMessage:(NSString *) msg{        dispatch_async(dispatch_get_main_queue(), ^{        [[self.window viewWithTag:88888] hideAnimated:YES];        [[self.window viewWithTag:88888] removeFromSuperViewOnHide];                                MBProgressHUD *HUDText = [MBProgressHUD showHUDAddedTo:self.window animated:YES];        // 设置只是显示文本        HUDText.tag = 88888;        HUDText.mode = MBProgressHUDModeText;        HUDText.label.text = msg;        HUDText.margin = 10.0f;        //    CGPoint currentOffset = HUDText.offset;        //    currentOffset.y = -[UIScreen mainScreen].bounds.size.height / 2 + 80; // 设置Y的起始位置        //    HUDText.offset = currentOffset;        HUDText.removeFromSuperViewOnHide = YES;        [HUDText setUserInteractionEnabled:NO];        [HUDText hideAnimated:YES afterDelay:2.8];    });}