IOS开发之触摸背景关闭键盘的代码实现

// 触摸背景，关闭键盘
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    UITouch *touch = [touches anyObject];
    UIView *view = (UIView *)[touch view];
    if (view == self.view) {
        [weightTextField resignFirstResponder];
    }
}