Basic view utils (Alets, Notification messages)

UIView+Util.h

//
//  UIView+Utilities.h
//
//  Created by Konstantin Simakov
//

#import <Foundation/Foundation.h>

@interface UIView (Utilities)

-(void)showActivityIndicator;
-(void)showActivityIndicatorWithAlpha:(CGFloat)alpha andPosition:(UIViewContentMode)contentMode;

-(void)hideActivityIndicator;

-(void)showMessageWithTitle:(NSString *)title andText:(NSString *)text;
-(void)showMessageWithTitle:(NSString *)title andText:(NSString *)text withDelay:(NSTimeInterval)showDelay;
-(void)showErrorWithTitle:(NSString *)title andText:(NSString *)text;
-(void)showErrorWithTitle:(NSString *)title andText:(NSString *)text withDelay:(NSTimeInterval)showDelay;

-(void)showAlertMessageWithTitle:(NSString *)title andText:(NSString *)text;

@end

UIView+Util.m

//
//  UIView+Utilities.m
//
//  Created by Konstantin Simakov
//

#import "UIView+Utilities.h"
#import <MBProgressHUD.h>

typedef NS_ENUM(NSInteger, FViewMessageType) {
    FViewMessageTypeAlert,
    FViewMessageTypeError
};

@implementation UIView (Utilities)

UIActivityIndicatorView *_activityIndicator;
UIView *_wrapperView;
MBProgressHUD *_hud;

-(void)showActivityIndicator
{
    [self showActivityIndicatorWithAlpha:0.5 andPosition:UIViewContentModeCenter];
}

-(void)hideActivityIndicator
{
    if (!_activityIndicator) {
        return;
    }
    
    [_activityIndicator stopAnimating];
    [_activityIndicator removeFromSuperview];
    _activityIndicator = nil;
    
    [_wrapperView removeFromSuperview];
}

-(void)showActivityIndicatorWithAlpha:(CGFloat)alpha andPosition:(UIViewContentMode)contentMode
{
    if (!_activityIndicator) {
        _wrapperView = [[UIView alloc] init];
        _wrapperView.backgroundColor = [UIColor colorWithWhite:0 alpha:alpha];
        [self addSubview:_wrapperView];
        
        _activityIndicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
        [_wrapperView addSubview:_activityIndicator];
    }
    
    _wrapperView.frame = self.bounds;
    CGRect frame = self.bounds;
    CGFloat size = 40;
    switch (contentMode) {
        case UIViewContentModeCenter:
            frame = self.bounds;
            break;
        case UIViewContentModeTop:
            frame = CGRectMake(0, 0, frame.size.width, size);
            break;
        case UIViewContentModeBottom:
            frame = CGRectMake(0, frame.size.height - size, frame.size.width, size);
            break;
        case UIViewContentModeLeft:
            frame = CGRectMake(0, 0, size, frame.size.height);
            break;
        case UIViewContentModeRight:
            frame = CGRectMake(frame.size.width - size, 0, size, frame.size.height);
            break;
        default:
            frame = self.bounds;
            break;
    }
    _activityIndicator.frame = frame;
    [_activityIndicator startAnimating];
    [self bringSubviewToFront:_wrapperView];
}


-(void)showMessageWithTitle:(NSString *)title andText:(NSString *)text
{
    [self showMessageWithTitle:title andText:text withDelay:0.1];
}

-(void)showMessageWithTitle:(NSString *)title andText:(NSString *)text withDelay:(NSTimeInterval)showDelay
{
    [self showHudWithType:FViewMessageTypeAlert title:title andText:text withDelay:showDelay];
}

-(void)showErrorWithTitle:(NSString *)title andText:(NSString *)text
{
    [self showErrorWithTitle:title andText:text withDelay:0.1];
}

-(void)showErrorWithTitle:(NSString *)title andText:(NSString *)text withDelay:(NSTimeInterval)showDelay
{
    [self showHudWithType:FViewMessageTypeError title:title andText:text withDelay:showDelay];
}

-(void)showHudWithType:(FViewMessageType)type title:(NSString *)title andText:(NSString *)text withDelay:(NSTimeInterval)showDelay
{
    UIWindow *window = self.window;
    if (!window) {
        window = [[UIApplication sharedApplication] keyWindow];
    }
    if (!_hud) {
        _hud = [[MBProgressHUD alloc] initWithWindow:window];
        [window addSubview:_hud];
    }
    
    switch (type) {
        case FViewMessageTypeAlert:
            _hud.mode = MBProgressHUDModeText;
            break;
        case FViewMessageTypeError: {
            _hud.mode = MBProgressHUDModeCustomView;
            UIImageView *imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"alert_error_icon"]];
            _hud.customView = imageView;
            break;
        }
        default:
            break;
    }
    
    _hud.animationType = MBProgressHUDAnimationFade;
    _hud.yOffset = 170;
    _hud.margin = 8;
    _hud.userInteractionEnabled = NO;
    
    _hud.labelText = title;
    _hud.detailsLabelText = text;
    
    _hud.labelFont = [UIFont fontWithName:@"Helvetica" size:16];
    _hud.detailsLabelFont = [UIFont fontWithName:@"Helvetica-Light" size:14];
    
    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, showDelay * NSEC_PER_SEC);
    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
        [_hud show:YES];
        [_hud hide:YES afterDelay:3];
    });
}


-(void)showAlertMessageWithTitle:(NSString *)title andText:(NSString *)text
{
    UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:title
                                                        message:text
                                                       delegate:nil
                                              cancelButtonTitle:@"OK"
                                              otherButtonTitles:nil];
    [alertView show];
}


@end