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//
// CustomDropMenuView.m
// redstar
//
// Created by admin on 15/10/25.
// Copyright © 2015年 ZWF. All rights reserved.
//
#import "CustomDropMenuView.h"
@interface CustomDropMenuView ()
/**
* 将来用来显示具体内容的容器
*/
@property (nonatomic, weak) UIView *showView;
@end
@implementation CustomDropMenuView
// 便利构造器
+ (instancetype)defaultMenuView
{
return [[self alloc] init];
}
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// 清除颜色
self.backgroundColor = [UIColor clearColor];
}
return self;
}
/**
* 重写setter方法
*/
- (void)setContent:(UIView *)content
{
_content = content;
// 调整内容的位置
content.x = 10;
content.y = 15;
// 添加内容到灰色图片中
[self.showView addSubview:content];
// 顶端
NSLayoutConstraint *contentTop = [NSLayoutConstraint constraintWithItem:content attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:self.showView attribute:NSLayoutAttributeTop multiplier:1.0 constant:0];
[self.showView addConstraint:contentTop];
// 左边
NSLayoutConstraint *contentLeft = [NSLayoutConstraint constraintWithItem:content attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:self.showView attribute:NSLayoutAttributeLeft multiplier:1.0 constant:0];
[self.showView addConstraint:contentLeft];
// 右边
NSLayoutConstraint *contentRight = [NSLayoutConstraint constraintWithItem:content attribute:NSLayoutAttributeRight relatedBy:NSLayoutRelationEqual toItem:self.showView attribute:NSLayoutAttributeRight multiplier:1.0 constant:0];
[self.showView addConstraint:contentRight];
// 高度
NSLayoutConstraint *contentBottom = [NSLayoutConstraint constraintWithItem:content attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:self.showView attribute:NSLayoutAttributeBottom multiplier:1.0 constant:0];
[self.showView addConstraint:contentBottom];
}
- (void)setContentController:(UIViewController *)contentController
{
_contentController = contentController;
self.content = contentController.view;
}
/**
* 显示
*/
- (void)showFrom:(UIView *)from
{
// 1.获得最上面的窗口
UIWindow *window = [[UIApplication sharedApplication].windows lastObject];
// 2.添加自己到窗口上
[window addSubview:self];
// 3.设置尺寸
self.frame = window.bounds;
// 通知外界，自己显示了
if ([self.delegate respondsToSelector:@selector(dropdownMenuDidShow:)]) {
[self.delegate dropdownMenuDidShow:self];
}
}
/**
* 销毁
*/
- (void)dismiss
{
[self removeFromSuperview];
// 通知外界，自己被销毁了
if ([self.delegate respondsToSelector:@selector(dropdownMenuDidDismiss:)]) {
[self.delegate dropdownMenuDidDismiss:self];
}
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
[self dismiss];
}
- (UIView *)showView
{
if (!_showView) {
// 添加一个灰色图片控件
UIView *showView = [[UIView alloc] init];
showView.backgroundColor = [UIColor clearColor];
showView.userInteractionEnabled = YES; // 开启交互
showView.translatesAutoresizingMaskIntoConstraints = NO;
[self addSubview:showView];
// 顶端
NSLayoutConstraint *showTop = [NSLayoutConstraint constraintWithItem:showView attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeTop multiplier:1.0 constant:self.showTop];
[self addConstraint:showTop];
// 左边
NSLayoutConstraint *showViewLeft = [NSLayoutConstraint constraintWithItem:showView attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeLeft multiplier:1.0 constant:self.showLeft];
[self addConstraint:showViewLeft];
// 右边
NSLayoutConstraint *showViewRight = [NSLayoutConstraint constraintWithItem:showView attribute:NSLayoutAttributeRight relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeRight multiplier:1.0 constant:self.showRight];
[self addConstraint:showViewRight];
// 高度
NSLayoutConstraint *showViewHeight = [NSLayoutConstraint constraintWithItem:showView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:self.showHeight];
[showView addConstraint:showViewHeight];
self.showView = showView;
}
return _showView;
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
// Drawing code
}
*/
@end