ios 键盘右上角添加完成按钮

在调出键盘后，我们通常希望在键盘的右上角添加一个完成的按钮，也就是给键盘添加一个附属的视图。

我们知道，在uitextField或uitextView获得焦点的时候，键盘弹出。要在键盘的右上角添加完成按钮，其实就是通过设置它们的inputAccessoryView属性实现的:

先看看现实方法：

    UIToolbar *bar = [[UIToolbaralloc]initWithFrame:CGRectMake(0,0,SCREEN_WIDTH,44)];

    UIButton *button = [[UIButtonalloc]initWithFrame:CGRectMake(SCREEN_WIDTH -60, 7,50,30)];

    [button setTitle:@'完成'forState:UIControlStateNormal];

    [button setTitleColor:COLOR_ORANGE_LIGHTforState:UIControlStateNormal];

    [bar addSubview:button];

    _textField.inputAccessoryView = bar;

效果差不多这样子：

当然如果你觉得每次时候textField都需要添加这段代码太麻烦，有没有一劳永逸的办法：

答案是有，就是继承uitextField，重写它的drawRect：

- (void)drawRect:(CGRect)rect {

    [superdrawRect:rect];

    UIToolbar *bar = [[UIToolbaralloc]initWithFrame:CGRectMake(0,0,SCREEN_WIDTH,44)];

    UIButton *button = [[UIButtonalloc]initWithFrame:CGRectMake(SCREEN_WIDTH - 60, 7,50,30)];

    [button setTitle:@'完成'forState:UIControlStateNormal];

    [button setTitleColor:[UIColorredColor]forState:UIControlStateNormal];

    button.layer.borderColor = [UIColorredColor].CGColor;

    button.layer.borderWidth =1;

    button.layer.cornerRadius =3;

    [bar addSubview:button];

    self.inputAccessoryView = bar;

    

    [button addTarget:selfaction:@selector(print)forControlEvents:UIControlEventTouchUpInside];

}

- (void) print {

    NSLog(@'button click');

}