self.searchBar.keyboardType = UIKeyboardTypeNumberPad;如果使用的不是搜索框而是textField輸入框，可以設(shè)置textField的鍵盤屬性來展示 self.textField.keyboardType = UIKeyboardTypeNumberPad;監(jiān)聽事件如下所示即可。

但是這里有個問題，就是數(shù)字鍵盤上面沒有“搜索”按鈕，這樣子用戶在輸入完手機號碼后無法搜索。所以這個時候我們需要自己添加一個自定義的搜索按鈕，然后加到鍵盤上面。

解決思路如下所示：

1.自定義搜索button

2.監(jiān)聽鍵盤出現(xiàn)的事件

3.遍歷搜索的Windows窗體，找到鍵盤的窗體，然后遍歷其子視圖，找到我們真正需要的鍵盤視圖

4.把我們自定義的按鈕加到上面找到的視圖里

這里要注意的一點，隨著iOS SDK的不斷發(fā)展，keyboard的視圖名稱也不斷在更新變化，當(dāng)你調(diào)試以下代碼無法得到期待的效果時，請重新遍歷一次窗臺，然后慢慢調(diào)試，找到真正需要的視圖名稱。

解決代碼

1.自定義搜索按鈕

// 搜索按鈕
_searchButton = [UIButton buttonWithType:UIButtonTypeCustom];
_searchButton.frame = CGRectMake(0, 163, 106, 53);
[_searchButton setTitle:@"搜索" forState:UIControlStateNormal];
[_searchButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[_searchButton addTarget:self action:@selector(SearchButtonDidTouch:) forControlEvents:UIControlEventTouchUpInside];

2.監(jiān)聽鍵盤出現(xiàn)的事件

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShowOnDelay:) name:UIKeyboardWillShowNotification object:nil];
- (void)keyboardWillShowOnDelay:(NSNotification *)notification {
[self performSelector:@selector(keyboardWillShow:) withObject:nil afterDelay:0];
}

這里面監(jiān)聽通知后的執(zhí)行函數(shù)并非立馬執(zhí)行查找窗體的函數(shù)，是因為在iOS4后，鍵盤添加到窗體的事件放到了下一個EventLoop，所以我們采用了延遲的方法。

3. 遍歷視圖,并添加按鈕

- (void)keyboardWillShow:(NSNotification *)notification {
UIView *foundKeyboard = nil;
UIWindow *keyboardWindow = nil;
for (UIWindow *testWindow in [[UIApplication sharedApplication] windows]) {
if (![[testWindow class] isEqual:[UIWindow class]]) {
keyboardWindow = testWindow;
break;
}
}
if (!keyboardWindow) return;
for (__strong UIView *possibleKeyboard in [keyboardWindow subviews]) {
if ([[possibleKeyboard description] hasPrefix:@"<UIInputSetContainerView"]) {
for (__strong UIView *possibleKeyboard_2 in possibleKeyboard.subviews) {
if ([possibleKeyboard_2.description hasPrefix:@"<UIInputSetHostView"]) {
foundKeyboard = possibleKeyboard_2;
}
}
}
}
if (foundKeyboard) {
if ([[foundKeyboard subviews] indexOfObject:_searchButton] == NSNotFound) {
[foundKeyboard addSubview:_searchButton];
} else {
[foundKeyboard bringSubviewToFront:_searchButton];
}
}
}