More "functional" Obj-C 'switch'

gistfile1.m

    // Ref: https://developer.apple.com/library/ios/documentation/Cocoa/Conceptual/ProgrammingWithObjectiveC/WorkingwithBlocks/WorkingwithBlocks.html#//apple_ref/doc/uid/TP40011210-CH8-SW9
    
    
   if (type == SRFSideBarHeaderTypeClear) {
        self.backgroundView.hidden = YES;
        self.titleImageView.hidden = YES;
    }
    else {
        NSString *imageName = ^{
            switch (type) {
                case SRFSidebarHeaderTypeTV:
                    return @"header_title_tv";
                    break;
                case SRFSidebarHeaderTypeRadio:
                    return @"sidebar_header_radio";
                    break;
                case SRFSidebarHeaderTypeMerkliste:
                    return @"sidebar_header_merkliste";
                    break;
                default:
                    return @"unknown";
                    break;
            }}();
        
        self.titleImageView.image = [UIImage imageNamed:[imageName xibIdiomExtension]];
    }
    
    // Instead of:
    
    switch (type) {
        case SRFSidebarHeaderTypeTV:
            self.titleImageView.image = [UIImage imageNamed:[@"header_title_tv" xibIdiomExtension]];
            break;
            
        case SRFSidebarHeaderTypeRadio:
            self.titleImageView.image = [UIImage imageNamed:@"sidebar_header_radio.png"];
            break;
            
        case SRFSidebarHeaderTypeMerkliste:
            self.titleImageView.image = [UIImage imageNamed:@"sidebar_header_merkliste.png"];
            break;
            
        case SRFSideBarHeaderTypeClear:
            self.backgroundView.hidden = YES;
            self.titleImageView.hidden = YES;
            break;
    }