loadNibNamed:(NSString *)name owner:(nullable id)owner options:(nullable NSDictionary *)options用法 - Java

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1.name xib的名字 owner当前类对象 options初始参数

实际应用：

NSArray *nibs = [[NSBundle mainBundle] loadNibNamed:@"***" owner:self options:nil];

nibs[0]是当前view的对象 nibs[1]当前view的背景，我们可以在init中对当前frame以及当前view的背景的frame进行赋值， nibs[1]的背景是半透明的，如果当前的xib是View,把view添加到父对象的时候nibs[1]没有添加到父空间，则当前的view是全透明的，

举个例子：这个是我创建的xib

该xib对应的initWith

-(instancetype)initWithCancleButtonTitle:(NSString *)cancelTitle otherButtonTitle:(NSString *)otherTitle

{

    CGRect frame = CGRectMake(0, 0, Main_Screen_Width-40, 180);

    self = [super initWithFrame:frame];

    if (self) {

        NSArray *nibs = [[NSBundle mainBundle] loadNibNamed:@"***" owner:self options:nil];

        self = nibs[0];

        self.frame = CGRectMake(0, 0, Main_Screen_Width-40, 180);

        coverView = nibs[1];

        [self setUIController];

        if (rect.size.height > 54) {

            self.frame = CGRectMake(0, 0, Main_Screen_Width-40, 180);

        }

        [self.cancleButton setTitle:cancelTitle forState:UIControlStateNormal];

        [self.otherButton setTitle:otherTitle forState:UIControlStateNormal];

    }

    return self;

}

-(void)setUIController{

    coverView.frame = CGRectMake(0, 0, Main_Screen_Width, Main_Screen_Height);

    coverView.backgroundColor = [UIColor redColor];

    self.layer.cornerRadius = 4.0;

    self.layer.masksToBounds = YES;

    [self.cancleButton setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];

    [self.otherButton setTitleColor:[UIColor greenColor] forState:UIControlStateNormal];

    _line1.backgroundColor = [UIColor grayColor];

    _line2.backgroundColor = [UIColor grayColor];

}

把当前view添加到window上：

UIWindow *window = [UIApplication sharedApplication].keyWindow;

    self.center = CGPointMake(Main_Screen_Width/2, Main_Screen_Height/2);

    [window addSubview:coverView];

    [window addSubview:self];