TSMenuLabel是一個(gè)給Label加menuController的控件

0. 需求分析

需要復(fù)制商品標(biāo)題,需要在Label上加MenuController,但是UILabel是自己不帶MenuController,所以自己寫了一個(gè)

### 1. 效果 TSMenuLabel 是繼承自UILabel的控件,給UILabel添加了手勢,并添加了menuViewController,點(diǎn)擊會(huì)有事件

效果查看:

2. 封裝方法

/**
?初始化方法?@param?menuType?彈窗類型
?@param?gestureType?手勢類型
?@return?返回label
?*/
+?(instancetype)mneuLabelWithMenuType:(TSMneuLabelMenuType)menuType
???????????????????????andGestureType:(TSMneuLabelGestureType)gestureType;

3. 原理

讓UILabel能處理MenuControler,需要設(shè)置以下代碼

-?(BOOL)canBecomeFirstResponder{????return?YES;
}/**
?*?label能執(zhí)行哪些操作(比如copy,?paste等等)
?*?@return??YES:支持這種操作
?*??由于這里需要實(shí)現(xiàn)自定義的中文菜單，而不是使用默認(rèn)的，所以這里選擇NO
?*/-?(BOOL)canPerformAction:(SEL)action?withSender:(id)sender{????//這里也是間接影響顯示在UIMenuController的控件
????if?(action?==?@selector(copy:))?{????????return?YES;//如果要去掉?拷貝?這里返回NO
????}else?if?(action?==?@selector(flag:)){????????return?NO;//這里如果是no?就不允許操作和顯示
????}else?if?(action?==?@selector(approve:)){????????return?YES;
????}else?if?(action?==?@selector(deny:)){????????return?YES;
????}else{????????return?[super?canPerformAction:action?withSender:sender];
????}
}

4. 擴(kuò)展

更多手勢和事件需要自己添加,添加方法:

1. 添加事件

在枚舉中添加一個(gè)枚舉,比如TSMneuLabelTypeDemo

typedef?NS_ENUM(NSInteger,?TSMneuLabelMenuType)?{
????TSMneuLabelTypeDefault,//啥也沒有
????TSMneuLabelTypeCopy?=?1,//只有復(fù)制
????TSMneuLabelTypeDemo,//栗子};

在處理手勢中添加menu

-(void)handleTap:(UIGestureRecognizer*)?recognizer
{????????case?TSMneuLabelTypeDemo:{

????????????UIMenuItem?*flag?=?[[UIMenuItem?alloc]?initWithTitle:@"abc"?action:@selector(flag:)];
????????????UIMenuItem?*approve?=?[[UIMenuItem?alloc]?initWithTitle:@"Approve"?action:@selector(approve:)];
????????????UIMenuItem?*deny?=?[[UIMenuItem?alloc]?initWithTitle:@"分享"?action:@selector(deny:)];
????????????[menu?setMenuItems:@[approve,flag,deny]];

????????}????????????break;
}

添加事件

-?(void)approve:(id)sender?{
????NSLog(@"Approve");
}

允許事件

-?(BOOL)canPerformAction:(SEL)action?withSender:(id)sender{????//這里也是間接影響顯示在UIMenuController的控件
????if?(action?==?@selector(copy:))?{????????return?YES;//如果要去掉?拷貝?這里返回NO
????}else?if?(action?==?@selector(flag:)){????????return?NO;//這里如果是no?就不允許操作和顯示
????}else?if?(action?==?@selector(approve:)){????????return?YES;
????}else?if?(action?==?@selector(deny:)){????????return?YES;
????}else{????????return?[super?canPerformAction:action?withSender:sender];
????}
}

1. 添加手勢

首先添加一個(gè)枚舉

typedef?NS_ENUM(NSInteger,?TSMneuLabelGestureType)?{
????TSMneuLabelGestureTypeNone,//強(qiáng)制不作處理
????TSMneuLabelGestureTypeDefault?=?0,//沒賦值會(huì)走tap
????TSMneuLabelGestureTypeTap,//默認(rèn)單擊
????TSMneuLabelGestureTypeLongTap,//長按};

然后添加一個(gè)手勢

-?(void)setGestureType:(TSMneuLabelGestureType)gestureType{????//移除所有手勢
????for?(UIGestureRecognizer?*ges?in?self.gestureRecognizers)?{
????????[self?removeGestureRecognizer:ges];
????}????switch?(gestureType)?{????????case?TSMneuLabelGestureTypeTap:?{

????????????UITapGestureRecognizer?*touch?=?[[UITapGestureRecognizer?alloc]?initWithTarget:self?action:@selector(handleTap:)];
????????????touch.numberOfTapsRequired?=?1;
????????????[self?addGestureRecognizer:touch];
????????}????????????break;????????case?TSMneuLabelGestureTypeLongTap:?{

????????????UILongPressGestureRecognizer?*touch?=?[[UILongPressGestureRecognizer?alloc]?initWithTarget:self?action:@selector(handleTap:)];
????????????[self?addGestureRecognizer:touch];
????????}????????????break;
????????default:
????????????break;
????}

}

1. 更多

• 拋出事件可以利用已經(jīng)定義好的Block來處理 ``` typedef void(^TSMneuLabelHandler)(TSMneuLabel * menuLabel);