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

- (void)viewDidLoad

{

[super viewDidLoad];

UIButton *button = [UIButton buttonWithType: UIButtonTypeRoundedRect];

[button setTitle: @"自定义title" forState: UIControlStateNormal];

[button sizeToFit];

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];