直接上代码
.h 文件
@interface KeyBoderHandlerTool : NSObject
- (void)handleKeyBoderAction:(UIView *)handleView offsetY:(CGFloat )offsetY;
+ (instancetype)getSharedKeyBoderTool;
@end
.m文件
#import "KeyBoderHandlerTool.h"
@interface KeyBoderHandlerTool ()
@property (strong, nonatomic) NSArray *names;
@property (strong, nonatomic) UIView *keyBoderHandleView;
@property (assign, nonatomic) CGFloat keyBoderHandleHeigt;
@property (strong, nonatomic) KeyBoderHandlerTool *sharedTool;
@end
static KeyBoderHandlerTool *sharedTool = nil;
@implementation KeyBoderHandlerTool
+ (instancetype)getSharedKeyBoderTool{
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
sharedTool = [self new];
});
return sharedTool;
}
+ (id)allocWithZone:(struct _NSZone *)zone{
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
sharedTool = [super allocWithZone:zone];
});
return sharedTool;
}
/**
处理键盘遮盖
@param handleView 可能会被遮盖的子视图
@param offsetY 如果父视图是可滑动视图，则 需传入在Y 轴上的 偏移量， 否则传 0
*/
- (void)handleKeyBoderAction:(UIView *)handleView offsetY:(CGFloat )offsetY{
if (self.keyBoderHandleView != nil) {
self.keyBoderHandleView = handleView;
return;
}
self.keyBoderHandleView = handleView;
__weak KeyBoderHandlerTool *weakSelf = self;
[[NSNotificationCenter defaultCenter] addObserverForName:UIKeyboardDidShowNotification object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification * _Nonnull note) {
[weakSelf keyboardDidShowFrame:note offsetY:offsetY];
}];
[[NSNotificationCenter defaultCenter] addObserverForName:UIKeyboardWillHideNotification object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification * _Nonnull note) {
[weakSelf keyboardWillHidden:note];
}];
}
//键盘出现
- (void)keyboardDidShowFrame:(NSNotification *)note offsetY:(CGFloat )offsetY{
// 取出键盘最终的frame
CGRect keyBoderRect = [note.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
// 取出键盘弹出需要花费的时间
double duration = [note.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];
CGFloat boundHeight = UIScreen.mainScreen.bounds.size.height;
CGFloat viewMaxY = CGRectGetMaxY(self.keyBoderHandleView.frame) - offsetY;
self.keyBoderHandleHeigt = viewMaxY - (boundHeight-keyBoderRect.size.height);
if (self.keyBoderHandleHeigt <= 0) {
return;
}
if (self.keyBoderHandleView.superview != nil) {
UIView *superView = self.keyBoderHandleView.superview;
[UIView animateWithDuration:duration animations:^{
self.keyBoderHandleView.superview.frame = CGRectMake(superView.frame.origin.x, superView.frame.origin.y-self.keyBoderHandleHeigt, superView.bounds.size.width, superView.bounds.size.height);
}];
}
}
//键盘消失
- (void)keyboardWillHidden:(NSNotification *)note{
// 取出键盘弹出需要花费的时间
double duration = [note.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];
[UIView animateWithDuration:duration animations:^{
UIView *superView = self.keyBoderHandleView.superview;
self.keyBoderHandleView.superview.frame = CGRectMake(superView.frame.origin.x, superView.frame.origin.y+self.keyBoderHandleHeigt, superView.bounds.size.width, superView.bounds.size.height);
}];
}
- (void)dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
@end
使用：
[[KeyBoderHandlerTool getSharedKeyBoderTool] handleKeyBoderAction:textField offsetY:0];
注意点：
1:在 确定不需要再监听的情况下可以 调用 工具类中的 销毁方法
2: 发生界面跳转等情况时，请先将键盘隐藏（self.view.endEditing(true)）
传送门swift版本：//www.greatytc.com/p/9b5cd064ea95
