p.p1 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px "PingFang SC"; color: #008400 }
p.p2 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3e1e81 }
p.p3 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #000000 }
span.s1 { font: 11.0px Menlo; color: #000000 }
span.s2 { font: 11.0px Menlo }
span.s3 { }
span.s4 { color: #000000 }
span.s5 { color: #703daa }
span.s6 { color: #ba2da2 }
span.s7 { color: #3e1e81 }
p.p1 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #000000 }
p.p2 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3e1e81 }
p.p3 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #000000; min-height: 13.0px }
p.p4 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #703daa }
p.p5 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px "PingFang SC"; color: #008400 }
p.p6 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #31595d }
span.s1 { }
span.s2 { color: #ba2da2 }
span.s3 { color: #000000 }
span.s4 { color: #703daa }
span.s5 { color: #d12f1b }
span.s6 { font: 11.0px "PingFang SC"; color: #d12f1b }
span.s7 { color: #4f8187 }
span.s8 { color: #3e1e81 }
span.s9 { font: 11.0px Menlo; color: #000000 }
span.s10 { font: 11.0px Menlo }
p.p1 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #4f8187 }
p.p2 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #ba2da2 }
p.p3 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #000000 }
span.s1 { color: #ba2da2 }
span.s2 { color: #000000 }
span.s3 { }
span.s4 { color: #703daa }
1.定义一个记录光标底部的成员变量cursorBottom
2.监听键盘出现和键盘消失通知(记得在dealloc方法中 移除监听器)
3.在UITextField的代理方法textFieldShouldBeginEditing:中转换当前输入框的原点坐标到scrollView中的坐标,计算光标底部坐标并保存
4.在监听键盘出现执行方法中计算 需不需要滚动及滚动大小,动画实现滚动
5.在监听键盘消失方法和点击空白处方法,关闭键盘
主要实现代码如下:
@interface AddAccountViewController ()<UITextFieldDelegate>
@property (nonatomic, assign) CGFloat cursorBottom;
@end
p.p1 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #000000 }
span.s1 { color: #ba2da2 }
span.s2 { }
@implementation AddAccountViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.scrollView = [[UIScrollView alloc] initWithFrame:self.view.bounds];
self.scrollView.backgroundColor = self.view.backgroundColor;
[self.scrollView addGestureRecognizer:[[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(hiddenKeyboard)]];
[self.view addSubview:self.scrollView];
//注册键盘出现的通知
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillShow:)
name:UIKeyboardWillShowNotification object:nil];
//注册键盘消失的通知
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillHide:)
name:UIKeyboardWillHideNotification object:nil];
[self setupAccountInfo];
}
p.p1 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #000000 }
p.p2 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3e1e81 }
span.s1 { }
span.s2 { color: #ba2da2 }
span.s3 { color: #000000 }
span.s4 { color: #703daa }
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
p.p1 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #78492a }
p.p2 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #000000 }
p.p3 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #000000; min-height: 13.0px }
p.p4 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #ba2da2 }
span.s1 { }
span.s2 { color: #ba2da2 }
span.s3 { color: #703daa }
span.s4 { color: #3e1e81 }
span.s5 { color: #272ad8 }
span.s6 { color: #4f8187 }
span.s7 { color: #000000 }
p.p1 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #78492a }
p.p2 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #000000 }
p.p3 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #000000; min-height: 13.0px }
p.p4 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #ba2da2 }
p.p5 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px "PingFang SC"; color: #008400 }
p.p6 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #703daa }
p.p7 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #008400 }
p.p8 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3e1e81 }
span.s1 { }
span.s2 { color: #ba2da2 }
span.s3 { color: #703daa }
span.s4 { color: #3e1e81 }
span.s5 { color: #272ad8 }
span.s6 { color: #4f8187 }
span.s7 { color: #000000 }
span.s8 { font: 11.0px "PingFang SC" }
span.s9 { font: 11.0px Menlo }
span.s10 { font: 11.0px Menlo; color: #000000 }
#pragma mark UITextFieldDelegate
-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField
{
CGPoint point = [textField convertPoint:CGPointMake(0, 0) toView:_scrollView];
self.cursorBottom = textField.height+point.y ;
return YES;
}
#pragma mark 键盘代理事件
///键盘显示事件
- (void) keyboardWillShow:(NSNotification *)notification {
//获取键盘高度,在不同设备上,以及中英文下是不同的
CGFloat kbHeight = [[notification.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size.height;
//计算出键盘顶端到inputTextView panel底端的距离(加上自定义的缓冲距离INTERVAL_KEYBOARD)
CGFloat offset = self.cursorBottom + kbHeight - self.view.height;
// 取得键盘的动画时间,这样可以在视图上移的时候更连贯
double duration = [[notification.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
//将视图上移计算好的偏移
if(offset > 0) {
[UIView animateWithDuration:duration animations:^{
self.scrollView.contentOffset = CGPointMake(0, offset);
}];
}
}
///键盘消失事件
- (void) keyboardWillHide:(NSNotification *)notify {
// 键盘动画时间
double duration = [[notify.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
//视图下沉恢复原状
[UIView animateWithDuration:duration animations:^{
self.scrollView.contentOffset = CGPointMake(0, 0);
}];
}
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
[self.view endEditing:YES];
}
- (void)hiddenKeyboard
{
[self.view endEditing:YES];
}
@end
p.p1 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #78492a }
p.p2 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px "PingFang SC"; color: #008400 }
p.p3 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #000000 }
p.p4 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #703daa }
p.p5 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #000000; min-height: 13.0px }
p.p6 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #008400 }
p.p7 { margin: 0.0px 0.0px 0.0px 0.0px; font: 11.0px Menlo; color: #3e1e81 }
span.s1 { }
span.s2 { font: 11.0px "PingFang SC" }
span.s3 { font: 11.0px Menlo }
span.s4 { color: #ba2da2 }
span.s5 { color: #703daa }
span.s6 { font: 11.0px Menlo; color: #000000 }
span.s7 { color: #000000 }
span.s8 { color: #3e1e81 }
span.s9 { color: #4f8187 }
span.s10 { color: #272ad8 }