UINavigationController的title添加点击事件并nsstring转nsdictionary

1. - (void)viewDidLoad   
2. {   
3.     [super viewDidLoad];   
4.     UIButton *button = [UIButton buttonWithType: UIButtonTypeRoundedRect];   
5.     [button setTitle: @"自定义title" forState: UIControlStateNormal];   
6.     [button sizeToFit];   
7.     self.navigationItem.titleView = button;} 

nsstring转化nsdictionary方法

首先nsstring就是一个nsdictionary

 NSString *results = [[NSString alloc] initWithString:@"dic"];

    NSDictionary *dic = [results objectFromJSONString];