Mac os - 键盘和鼠标监听

Mac os键盘和鼠标监听支持，也是在NSView层级别进行监听。

例如我现在需要监听TableView的鼠标邮件删除或者选择行后点击键盘delete。

所以第一步写Window下的TableView实现。

直接贴代码

typedef NS_ENUM(NSUInteger, FileTableViewKeyType) {
    FileTableViewKeyTypeEnterCharacter                = NSEnterCharacter,
    FileTableViewKeyTypeBackspaceCharacter            = NSBackspaceCharacter,
    FileTableViewKeyTypeTabCharacter                  = NSTabCharacter,
    FileTableViewKeyTypeNewlineCharacter              = NSNewlineCharacter,
    FileTableViewKeyTypeFormFeedCharacter             = NSFormFeedCharacter,
    FileTableViewKeyTypeCarriageReturnCharacter       = NSCarriageReturnCharacter,
    FileTableViewKeyTypeBackTabCharacter              = NSBackTabCharacter,
    FileTableViewKeyTypeDeleteCharacter               = NSDeleteCharacter,
    FileTableViewKeyTypeLineSeparatorCharacter        = NSLineSeparatorCharacter,
    FileTableViewKeyTypeParagraphSeparatorCharacter   = NSParagraphSeparatorCharacter
};


@protocol FileTableViewEventDelegate 
@optional
- (void)tableView:(NSTableView *)tableView didClickDownAtKeyType:(FileTableViewKeyType)keyType indexSet:(NSIndexSet *)indexSet;;

- (void)tableView:(NSTableView *)tableView didClickDeleteAtIndexSet:(NSIndexSet *)indexSet;

@end

@interface FileTableView : NSTableView
@property (nullable, weak) id  eventDelegate;
@end

#import "FileTableView.h"

@interface FileTableView()

@end

@implementation FileTableView

- (void)drawRect:(NSRect)dirtyRect {
    [super drawRect:dirtyRect];
    
    // Drawing code here.
}

- (void)keyDown:(NSEvent *)event {
    unichar character = [[event characters] characterAtIndex: 0];
    if([self.eventDelegate respondsToSelector:@selector(tableView:didClickDownAtKeyType:indexSet:)]) {
        [self.eventDelegate tableView:self didClickDownAtKeyType:character indexSet:[self selectedRowIndexes]];
    }
}


- (NSMenu *)menuForEvent:(NSEvent *)event {
    if (event.type == NSEventTypeRightMouseDown) {
        NSPoint menuPoint = [self convertPoint:[event locationInWindow] fromView:nil];
        NSInteger row = [self rowAtPoint:menuPoint];
        NSIndexSet *indexSet = [self selectedRowIndexes];
        if (row == -1 || [indexSet count] == 0) {
            return nil;
        }
        
        if ([indexSet containsIndex:row]) {
            NSMenu *menu = [[NSMenu alloc] initWithTitle:@"Custom"];
            NSMenuItem *deleteItem = [[NSMenuItem alloc] initWithTitle:@"Delete" action:@selector(deleteAction:) keyEquivalent:@""];
            [menu addItem:deleteItem];
            return menu;
        }
        return nil;
    }
    return nil;
}

- (void)deleteAction:(NSMenuItem *)item {
    NSIndexSet *indexSet = [self selectedRowIndexes];
    if([self.eventDelegate respondsToSelector:@selector(tableView:didClickDeleteAtIndexSet:)]) {
        [self.eventDelegate tableView:self didClickDeleteAtIndexSet:indexSet];
    }
}
@end