一丶键盘问题
1.解决键盘弹起,挡住文本框的问题;
二丶解决方案:
① 简易处理
第三方,一句话搞定;
其他博客详细介绍:
http://www.jianshu.com/p/9d7d246bd350/comments/1518291
使用:
#import <IQKeyboardManager.h>
② 自定义化处理
采用NSNotification
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
//监听键盘改变
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(KeyboardWillChangeFrame:) name:UIKeyboardWillChangeFrameNotification object:nil];
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
//取消监听
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillChangeFrameNotification object:nil];
}
#pragma mark - notification
- (void)KeyboardWillChangeFrame:(NSNotification *)notification
{
NSDictionary *info = [notification userInfo];
CGRect endKeyboardRect = [[info objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
CGRect tmpViewRect = self.view.frame;
if (endKeyboardRect.origin.y == [UIScreen height])
{
//下降
tmpViewRect.origin.y = 0;
}
else
{
//上升
CGFloat maxY = CGRectGetMaxY(self.backView.frame);
CGFloat spaceH = [UIScreen height] - maxY;
CGFloat keyboardH = endKeyboardRect.size.height;
if (spaceH < keyboardH) {
tmpViewRect.origin.y = - (keyboardH - spaceH);
}
}
self.view.frame = tmpViewRect;
}
三丶注意事项
1.添加监听者,和取消监听者写的位置在生命周期上是相对的;
2.别忘记取消监听;
