經(jīng)常使用微信聊天已慢,沒事兒就會想輸入框的實現(xiàn)過程曲聂,所以抽空,也實現(xiàn)了一個輸入框的功能佑惠;
經(jīng)過封裝朋腋,使用就非常的簡單了,在需要的VC中膜楷,實現(xiàn)方法如下:
- (void)viewDidLoad {
[super viewDidLoad];
self.view.backgroundColor = [UIColor colorWithRed:0.92 green:0.92 blue:0.92 alpha:1.00];
self.keyView = [[DKSKeyboardView alloc] initWithFrame:CGRectMake(0, K_Height - 51, K_Width, 51)];
//設置代理方法
self.keyView.delegate = self;
[self.view addSubview:_keyView];
}
主要就是上面的添加旭咽,此時輸入框就已經(jīng)添加到當前的VC中;稍后會講到里面的代理方法的作用赌厅;
工程結構如下圖
主要是紅色線標出的兩個類穷绵,結構比較簡單
DKSKeyboardView.h中的代碼如下:
#import @protocol DKSKeyboardDelegate @optional //非必實現(xiàn)的方法
/**
點擊發(fā)送時輸入框內的文案
@param textStr 文案
*/
- (void)textViewContentText:(NSString *)textStr;
/**
鍵盤的frame改變
*/
- (void)keyboardChangeFrameWithMinY:(CGFloat)minY;
@end
@interface DKSKeyboardView : UIView @property (nonatomic, weak) id delegate;
@end
關于上面的兩個代理方法,由于文章篇幅問題特愿,實現(xiàn)的過程可參考demo仲墨,里面有詳細的注釋勾缭;
在DKSKeyboardView.m中,以下列出少量重要代碼目养,主要是改變frame
1漫拭、點擊輸入框,鍵盤出現(xiàn)
//鍵盤將要出現(xiàn)
- (void)keyboardWillShow:(NSNotification *)notification {
[self removeBottomViewFromSupview];
NSDictionary *userInfo = notification.userInfo;
CGRect endFrame = [userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
//獲取鍵盤的高度
self.keyboardHeight = endFrame.size.height;
//鍵盤的動畫時長
CGFloat duration = [userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];
[UIView animateWithDuration:duration delay:0 options:[notification.userInfo[UIKeyboardAnimationCurveUserInfoKey] integerValue] animations:^{
self.frame = CGRectMake(0, endFrame.origin.y - self.backView.height - StatusNav_Height, K_Width, self.height);
[self changeTableViewFrame];
} completion:nil];
}
2混稽、鍵盤消失
- (void)keyboardWillHide:(NSNotification *)notification {
//如果是彈出了底部視圖時
if (self.moreClick || self.emojiClick) {
return;
}
[UIView animateWithDuration:0.25 animations:^{
self.frame = CGRectMake(0, K_Height - StatusNav_Height - self.backView.height, K_Width, self.backView.height);
[self changeTableViewFrame];
}];
}
3采驻、點擊更多按鈕
- (void)moreBtn:(UIButton *)btn {
self.emojiClick = NO; //主要是設置表情按鈕為未點擊狀態(tài)
if (self.moreClick == NO) {
self.moreClick = YES;
//回收鍵盤
[self.textView resignFirstResponder];
[self.emojiView removeFromSuperview];
self.emojiView = nil;
[self addSubview:self.moreView];
//改變更多、self的frame
[UIView animateWithDuration:0.25 animations:^{
self.moreView.frame = CGRectMake(0, self.backView.height, K_Width, bottomHeight);
self.frame = CGRectMake(0, K_Height - StatusNav_Height - self.backView.height - bottomHeight, K_Width, self.backView.height + bottomHeight);
[self changeTableViewFrame];
}];
} else { //再次點擊更多按鈕
//鍵盤彈起
[self.textView becomeFirstResponder];
}
}
4匈勋、改變輸入框大小
- (void)changeFrame:(CGFloat)height {
CGRect frame = self.textView.frame;
frame.size.height = height;
self.textView.frame = frame; //改變輸入框的frame
//當輸入框大小改變時礼旅,改變backView的frame
self.backView.frame = CGRectMake(0, 0, K_Width, height + (viewMargin * 2));
self.frame = CGRectMake(0, K_Height - self.backView.height - self.keyboardHeight, K_Width, self.backView.height);
//改變更多按鈕、表情按鈕的位置
self.emojiBtn.frame = CGRectMake(viewMargin, self.backView.height - viewHeight - viewMargin, viewHeight, viewHeight);
self.moreBtn.frame = CGRectMake(self.textView.maxX + viewMargin, self.backView.height - viewHeight - viewMargin, viewHeight, viewHeight);
//主要是為了改變VC的view的frame
if (self.delegate && [self.delegate respondsToSelector:@selector(changeFrameWithMinY:)]) {
[self.delegate changeFrameWithMinY:self.minY];
}
}
以上就是聊天輸入框的簡單實現(xiàn)洽洁,只是提供一個實現(xiàn)思路痘系,如果在聊天界面中接入,還需要處理以下問題:
1饿自、demo中沒有做tableViewCell的高度自適應汰翠;
2、輸入框文案較多時昭雌,tableViewCell可能會出現(xiàn)紊亂复唤,此處沒有處理