一个问号，点击给一个提示view的实现。

很简单的一个东西，不过为了应付各种情况，比如cell上有问号，点击弹出来，比如这样

又或者需要这样：

这时候需要做一个统一管理的样式，外部负责传入样式，view内部根据样式来定制。比如横竖，比如是否需要竖直列表的方式等。

上代码：

.h文件：typedef enum: NSUInteger{    AskViewShowTypeVertical = 0,// 水平展示    AskViewShowTypeHoritical = 1// 竖直展示}AskViewShowType;typedef enum: NSUInteger{// 箭头所依附的方向    ArrowDependDerectionTop = 0,    ArrowDependDerectionLeft = 1,    ArrowDependDerectionBottom = 2,    ArrowDependDerectionRight = 3}ArrowDependDerection;@interface XDYAskRemindView : UIView/** 初始化方法介绍 @param frame 可以使用masonry后传 @param type view展示方向，可以为横，竖 @param derection 箭头所在方向，上下左右 @param pvalue 箭头在某一方向的位置，如在上下，pvalue为x值，若在左或右，pvalue为y值 @param arr 内容数组，内部为字典结构 @param title 竖直展示时显示的title @return */-(instancetype)initWithFrame:(CGRect)frame axixWithType:(AskViewShowType)type arrowDepend:(ArrowDependDerection)derection point:(CGFloat)pvalue contentText:(NSArray <NSDictionary *> *)arr title:(NSString *)title;**.m文件**--------@interface XDYAskRemindView()@property (nonatomic, unsafe_unretained) AskViewShowType askType;@property (nonatomic, unsafe_unretained) ArrowDependDerection arrowDerection;@property (nonatomic, unsafe_unretained) CGFloat arrowLocate;@property (nonatomic, strong) NSArray <NSDictionary *> *contentArray;@property (nonatomic, strong) NSString *title;@property (nonatomic, unsafe_unretained) CGPoint arrowP;@end@implementation XDYAskRemindView-(void)drawRect:(CGRect)rect{    // 进入此方法后先画三角形，其他的部分在createview里面画，结构就是一个回字型，里面的口内部是用来画页面，里面口与外面口之间的通道用来挪移三角形的位置    if (_arrowDerection == ArrowDependDerectionTop) {        self.arrowP = CGPointMake(self.arrowLocate, 0);    }else if(_arrowDerection == ArrowDependDerectionLeft){        self.arrowP = CGPointMake(0,self.arrowLocate);    }else if(_arrowDerection == ArrowDependDerectionBottom){        self.arrowP = CGPointMake(self.arrowLocate,self.mj_h - H(20));    }else{        self.arrowP = CGPointMake(self.mj_w - W(20),self.arrowLocate);    }    CGContextRef context = UIGraphicsGetCurrentContext();    CGContextSetLineWidth(context, 0.5);    CGPoint points[3];    points[0] = self.arrowP;    if (_arrowDerection == ArrowDependDerectionTop) {        points[1] = CGPointMake(self.arrowP.x-W(10), self.arrowP.y+H(10));        points[2] = CGPointMake(self.arrowP.x+W(10), self.arrowP.y+H(10));    }else if(_arrowDerection == ArrowDependDerectionLeft){        points[1] = CGPointMake(self.arrowP.x+W(10), self.arrowP.y-H(10));        points[2] = CGPointMake( self.arrowP.x+W(10), self.arrowP.y+H(10));    }else if(_arrowDerection == ArrowDependDerectionBottom){        points[1] = CGPointMake(self.arrowP.x-W(10), self.arrowP.y-H(10));        points[2] = CGPointMake(self.arrowP.x+W(10), self.arrowP.y-H(10));    }else{        points[1] = CGPointMake(self.arrowP.x-W(10), self.arrowP.y-H(10));        points[2] = CGPointMake(self.arrowP.x-W(10), self.arrowP.y+H(10));    }    CGContextSetRGBFillColor(context, 0, 0, 0, 0.6);    CGContextSetStrokeColorWithColor(context, COLOR(clearColor).CGColor);    CGContextMoveToPoint(context, self.arrowP.x, self.arrowP.y);    CGContextAddLines(context, points, 3);    CGContextClosePath(context);    CGContextDrawPath(context, kCGPathFillStroke);}// 这个是初始化方法，在初始化方法中-(instancetype)initWithFrame:(CGRect)frame axixWithType:(AskViewShowType)type arrowDepend:(ArrowDependDerection)derection point:(CGFloat)pvalue contentText:(NSArray <NSDictionary *> *)arr title:(NSString *)title{    if (self = [super initWithFrame:frame]) {        self.askType = type;        self.arrowDerection = derection;        self.arrowLocate = pvalue;        self.title = title;        if (arr.count > 0) {            self.contentArray = [NSArray arrayWithArray:arr];        }else{            NSDictionary *dic = @{@"key":@"content",@"value":@""};            self.contentArray = [NSArray arrayWithObject:dic];        }        [self initViews];    }    return self;}- (instancetype)init{    return [self initWithFrame:CGRectZero axixWithType:AskViewShowTypeHoritical arrowDepend:ArrowDependDerectionTop point:0 contentText:nil title:@""];}- (instancetype)initWithFrame:(CGRect)frame{    return  [self initWithFrame:CGRectZero axixWithType:AskViewShowTypeHoritical arrowDepend:ArrowDependDerectionTop point:0 contentText:nil title:@""];}-(void)initViews{    self.backgroundColor = COLOR(clearColor);    UIView *bgView = [[UIView alloc] init];    bgView.backgroundColor = ColorRGBA(0, 0, 0, 0.6);    bgView.layer.cornerRadius = 4;    [self addSubview:bgView];    [bgView mas_makeConstraints:^(MASConstraintMaker *make) {        make.left.mas_equalTo(self.mas_left).offset(W(10));        make.right.mas_equalTo(self.mas_right).offset(-W(10));        make.top.mas_equalTo(self.mas_top).offset(W(10));        make.bottom.mas_equalTo(self.mas_bottom).offset(-W(10));    }];    UILabel *title = [[UILabel alloc] init];    title.yyFont(14).yyText(self.title).yyTextColor(COLOR(whiteColor));    [bgView addSubview:title];    [title mas_makeConstraints:^(MASConstraintMaker *make) {        make.left.mas_equalTo(self.mas_left).offset(W(15));        make.top.mas_equalTo(self.mas_top).offset(H(12));    }];    title.hidden = self.title.length == 0;    UIView *line = [[UIView alloc] init];    line.backgroundColor = ColorRGB(245, 245, 245);    [bgView addSubview:line];    [line mas_makeConstraints:^(MASConstraintMaker *make) {        make.left.mas_equalTo(title);        make.right.mas_equalTo(self.mas_right).offset(-W(15));        make.top.mas_equalTo(title.mas_bottom).offset(H(5));        make.height.mas_equalTo(1);    }];    line.hidden = self.title.length == 0;    if (self.contentArray.count == 1) {        NSDictionary *dic = self.contentArray[0];        UILabel *content = [[UILabel alloc] init];        content.yyFont(12).yyText(self.title).yyTextColor(COLOR(whiteColor));        content.text = [NSString stringWithFormat:@"%@",dic[@"value"]];        content.numberOfLines = 0;        content.lineBreakMode = NSLineBreakByWordWrapping;        [bgView addSubview:content];        [content mas_updateConstraints:^(MASConstraintMaker *make) {            if (self.title.length == 0 ) {                make.top.mas_equalTo(bgView.mas_top).offset(H(5));            }else{                make.top.mas_equalTo(line.mas_bottom).offset(H(5));            }            make.left.mas_equalTo(title);            make.width.mas_lessThanOrEqualTo(bgView);        }];    }else{        for (NSInteger i = 0; i<self.contentArray.count; i++) {            NSDictionary *dic = self.contentArray[i];            UILabel *content = [[UILabel alloc] init];            content.yyFont(12).yyText(self.title).yyTextColor(COLOR(whiteColor));            content.text = [NSString stringWithFormat:@"%@:%@",dic[@"key"],dic[@"value"]];            [bgView addSubview:content];            [content mas_makeConstraints:^(MASConstraintMaker *make) {                make.left.mas_equalTo(title);                make.top.mas_equalTo(line.mas_bottom).offset(H(5) + H(20)*i);            }];        }    }}

以上 就是这个提示view的创建，在调用的时候，外面创建调用该初始化方法，将要展示的内容以字典方式封入数组中传入，在里面进行解析，显示即可。实现的就是上图所示的效果。
github