MacOS 开发

关键词：MacOS 开发 , NSTextField，doCommandBySelector，isValidObject，NSControlSubclassNotifications，NSControlTextEditingDelegate，label

---

创建

• 比起 UITextField 可以输入多行

- (void)addTextField{    NSTextField *field0 = [[NSTextField alloc]initWithFrame:NSMakeRect(100, 100, 100, 100)];    [self.window.contentView addSubview:field0];    field0.backgroundColor = [NSColor cyanColor];    field0.textColor = [NSColor magentaColor];    field0.bordered = NO;//无边框    field0.delegate = self;}

---

特殊的 NSTextField – Label

文章请戳这里：
http://blog.csdn.net/lovechris00/article/details/77977541

---

NSControlSubclassNotifications

• 这里的三个方法，跟 UITextField 代理中常用的三个方法。不用同意代理就可以执行，这个挺好：

#pragma mark - NSControlSubclassNotifications- (void)controlTextDidBeginEditing:(NSNotification *)obj {    NSTextField *field = obj.object;    NSLog(@"controlTextDidBeginEditing : %@",field.stringValue);}- (void)controlTextDidEndEditing:(NSNotification *)obj {    NSTextField *field = obj.object;    NSLog(@"controlTextDidEndEditing : %@",field.stringValue);}- (void)controlTextDidChange:(NSNotification *)obj {    NSTextField *field = obj.object;    NSLog(@"controlTextDidChange : %@",field.stringValue);}

---

NSControlTextEditingDelegate

#pragma mark - NSControlTextEditingDelegate//点击 field 并准备输入第一个字母时。- (BOOL)control:(NSControl *)control textShouldBeginEditing:(NSText *)fieldEditor{    return YES;}//不再填写这个 field(如：去填写另外一个 field 的时)调用。如果文字没有改变，就不会调用。- (BOOL)control:(NSControl *)control textShouldEndEditing:(NSText *)fieldEditor{    return YES;}//输入文字后，在 EndEditing 之前调用。如果文字没有改变，就不会调用。//返回 NO 时，这个窗口不会响应其他的点击事件（不能去填别的）。- (BOOL)control:(NSControl *)control isValidObject:(nullable id)obj{    return YES;}//被其他方法调用时，如：点击 delete 按钮,commandSelector 为 deleteBackward:. tab:insertTab: 。//返回 YES 时，delete、tab 这些方法调用失败。所以需要返回 NO。- (BOOL)control:(NSControl *)control textView:(NSTextView *)textView doCommandBySelector:(SEL)commandSelector{    return YES;}- (BOOL)control:(NSControl *)control didFailToFormatString:(NSString *)string errorDescription:(nullable NSString *)error{    return YES;}- (void)control:(NSControl *)control didFailToValidatePartialString:(NSString *)string errorDescription:(nullable NSString *)error{    NSLog(@"didFailToValidatePartialString : %@",string);}- (NSArray<NSString *> *)control:(NSControl *)control textView:(NSTextView *)textView completions:(NSArray<NSString *> *)words forPartialWordRange:(NSRange)charRange indexOfSelectedItem:(NSInteger *)index{    NSLog(@"completions : %@",words);    return words;}

其实，我不知道最后三个方法怎么用。。。。。

---

自定义光标等

方法一：
参考：http://blog.csdn.net/skynullcode/article/details/49963257

遍历NSSearchField的子视图（subviews）, 取出_NSKeyboardFocusClipView类的对象，然后再取出里面的
NSTextView对象，调用setInsertionPointColor函数，传入想要的颜色，代码片段如下。

if (self.searchField.subviews.count) {    __block NSView *keyboardFocusClipView;    [self.searchField.subviews enumerateObjectsUsingBlock:^(id  obj,                                                            NSUInteger idx,                                                            BOOL *stop) {        //   NSClassFromString(@"_NSKeyboardFocusClipView");        if ([obj isKindOfClass:[NSClipView class]]) {            keyboardFocusClipView = obj;            *stop = YES;        }    }];    if (keyboardFocusClipView) {        NSView *view = keyboardFocusClipView.subviews[0];        [(NSTextView*)view setInsertionPointColor:cursorColor];    }}

方法二：
参考（内附demo）：http://www.tanhao.me/pieces/1580.html/

1、需要创建继承自 NSSearchFieldCell 的子类，修改某些方法；

//通过代码实例化- (id)init{    self = [super init];    if (self)    {        [self setUp];    }    return self;}//通过xib实例化- (id)initWithCoder:(NSCoder *)aDecoder{    self = [super initWithCoder:aDecoder];    if (self)    {        [self setUp];    }    return self;}- (void)setUp{//可以写你需要的设置}//重写该方法实现对光标颜色的修改// NSSearchField获取焦点，要显示光标的时候，都会调用该方法。- (NSText *)setUpFieldEditorAttributes:(NSText *)textObj{    NSText *text = [super setUpFieldEditorAttributes:textObj];    [(NSTextView*)text setInsertionPointColor:[NSColor whiteColor]];    return text;}

2、需要创建继承自 NSSearchField 的子类，实现下面方法来修改cell即可。

+ (void)setCellClass:(Class)factoryId{    [super setCellClass:[THSearchFieldCell class]];}+ (Class)cellClass{    return [THSearchFieldCell class];}

---

参考资料

• TH：自定义NSSearchFiled样式
  http://www.tanhao.me/pieces/1580.html/

---