iOS 键盘的收起

这个库的下载地址：https://github.com/hackiftekhar/IQKeyboardManager

键盘的收起用到了第三方的库IQKeyBoardManager，你在appDelegate中的

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 

写入

  /****************键盘收起**********************/
    IQKeyboardManager *manager = [IQKeyboardManager sharedManager];
    manager.enable = YES;
    manager.shouldResignOnTouchOutside = YES;
    manager.shouldToolbarUsesTextFieldTintColor = YES;
    manager.enableAutoToolbar = NO;

就可以在整个应用中点击空白处让键盘收起。