创建一个类从NSString字条串

NSClass_From_NSString.m

    NSString *className = [item[kItemKeyClassPrefix] stringByAppendingString:@"ViewController"];
    
    if (NSClassFromString(className)) {

        Class aClass = NSClassFromString(className);
        id instance = [[aClass alloc] init];
        
        if ([instance isKindOfClass:[UIViewController class]]) {
            
            [(UIViewController *)instance setTitle:item[kItemKeyTitle]];
            [self.navigationController pushViewController:(UIViewController *)instance
                                                 animated:YES];
        }
    }