//在view里添加一个点击事件

UITapGestureRecognizer *tapGr = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(viewTapped:)];

tapGr.cancelsTouchesInView = NO;

[self.view addGestureRecognizer:tapGr];

 

//点击空白处退出键盘

-(void)viewTapped:(UITapGestureRecognizer*)tapGr

{

[field resignFirstResponder];

}

//点击return 时调用的代理方法在这里退出键盘并完成搜索功能

-(BOOL)textFieldShouldReturn:(UITextField *)textField

{

[textField resignFirstResponder];

return YES;

}