先看效果

使用示例

pod 'PopoverObjC'

#import "ASViewController.h"
#import <PopoverObjC/ASPopover.h>

@interface ASViewController ()

@property (weak, nonatomic) IBOutlet UIButton *btn;
@property (nonatomic, strong) ASPopover *btnPopover;
@property (nonatomic, strong) ASPopover *itemPopover;

@end

@implementation ASViewController

- (void)viewDidLoad {
  [super viewDidLoad];
  [self.btn addTarget:self action:@selector(clickBtn:) forControlEvents:UIControlEventTouchUpInside];
  
  self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"item" style:UIBarButtonItemStylePlain target:self action:@selector(clickItem:)];
}

- (void)didReceiveMemoryWarning {
}

初始化Popover

- (ASPopover *)btnPopover {
  if (!_btnPopover) {
    ASPopoverOption *option = [[ASPopoverOption alloc] init];
    option.autoAjustDirection = YES;
    option.preferedType = ASPopoverTypeDown;
    option.arrowSize = CGSizeMake(9, 6);
    option.blackOverlayColor = [UIColor clearColor];
    option.popoverColor = [UIColor lightGrayColor];
    option.dismissOnBlackOverlayTap = YES;
    option.animationIn = 0.5;
    //...
    
    _btnPopover = [[ASPopover alloc] initWithOption:option];
  }
  return _btnPopover;
}


- (ASPopover *)itemPopover {
  if (!_itemPopover) {
    ASPopoverOption *option = [[ASPopoverOption alloc] init];
    option.autoAjustDirection = YES;
    option.arrowSize = CGSizeMake(10, 6);
    option.offset = 3;  // vertical offset from original show point, default is 0.
    option.blackOverlayColor = [UIColor clearColor];
    option.sideEdge = 7;
    option.dismissOnBlackOverlayTap = YES;
    option.popoverColor = [[UIColor blackColor] colorWithAlphaComponent:0.7];
    option.animationIn = 0.4;
    option.springDamping = 0.5;
    option.initialSpringVelocity = 1;
    option.overlayBlur = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
    //...
    
    _itemPopover = [[ASPopover alloc] initWithOption:option];
  }
  return _itemPopover;
}

popover的属性可在option里设置。

弹出气泡

- (void)clickBtn:(id)sender {
  UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width - 50, 40)];
  [self.btnPopover show:view fromView:self.btn];  // in delegate window
}

- (void)clickItem:(id)sender {
  UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 200)];
  UIView *itemView = [self.navigationItem.rightBarButtonItem valueForKey:@"view"]; // you should use custom view in item;
  if (itemView) {
    [self.itemPopover show:view fromView:itemView]; // above, option has contained offset value; invoke [self show:contentView fromView:fromView inView:keyWindow];
    
    /* other method to show
     
     CGPoint orignPoint = [self.itemPopover orignArrowPointWithView:view fromView:itemView];
     orignPoint.y += 5; // offset in option has same effect
     [self.itemPopover show:view atPoint:orignPoint];
     
     */
  }
}

可在某一个视图或某一个point上弹出内容view

Popover interface

#import <UIKit/UIKit.h>
#import "ASPopoverOption.h"

typedef void (^ASPopoverBlock)(void);

@interface ASPopover : UIView

@property (nonatomic, copy) ASPopoverBlock willShowHandler;
@property (nonatomic, copy) ASPopoverBlock willDismissHandler;
@property (nonatomic, copy) ASPopoverBlock didShowHandler;
@property (nonatomic, copy) ASPopoverBlock didDismissHandler;

@property (nonatomic, strong) ASPopoverOption *option;

- (instancetype)initWithOption:(ASPopoverOption *)option;

- (void)dismiss;

- (void)show:(UIView *)contentView fromView:(UIView *)fromView;
- (void)show:(UIView *)contentView fromView:(UIView *)fromView inView:(UIView *)inView;
- (void)show:(UIView *)contentView atPoint:(CGPoint)point;
- (void)show:(UIView *)contentView atPoint:(CGPoint)point inView:(UIView *)inView;

- (CGPoint)originArrowPointWithView:(UIView *)contentView fromView:(UIView *)fromView;
- (CGPoint)arrowPointWithView:(UIView *)contentView fromView:(UIView *)fromView inView:(UIView *)inView popoverType:(ASPopoverType)type;

@end

contentView: 要显示的内容； fromView: 气泡从某一个视图上show; inview: 气泡绘制在某一个视图上，一般为delegate window； atPoint: 气泡从某一点上show; 可先获取originPoint, 偏移；

PopoverOption Interface

#import <Foundation/Foundation.h>

typedef NS_ENUM(NSInteger, ASPopoverType) {
  ASPopoverTypeUp = 0,
  ASPopoverTypeDown,
};

@interface ASPopoverOption : NSObject

@property (nonatomic, assign) CGSize arrowSize; // default is (10, 7)
@property (nonatomic, assign) CGFloat offset; // vertical offset from original show point, default is 0.
@property (nonatomic, strong) UIColor *popoverColor;  // contain view color. including arrow.

@property (nonatomic, assign) BOOL autoAjustDirection; //effect just in view not at point; default is YES.
@property (nonatomic, assign) ASPopoverType preferedType; // just effect when autoAjustDirection = YES; default is ASPopoverTypeUp;
@property (nonatomic, assign) ASPopoverType popoverType; // default is ASPopoverTypeUp; not effect when autoAjustDirection = YES;

@property (nonatomic, assign) NSTimeInterval animationIn; // if 0, no animation; default is 0.6.
@property (nonatomic, assign) NSTimeInterval animationOut; // if 0, no animation; default is 0.3.
@property (nonatomic, assign) CGFloat springDamping;
@property (nonatomic, assign) CGFloat initialSpringVelocity;

@property (nonatomic, assign) CGFloat cornerRadius;
@property (nonatomic, assign) CGFloat sideEdge;
@property (nonatomic, strong) UIColor *blackOverlayColor; // default is black/alpha 0.2, can be clear color.
@property (nonatomic, strong) UIBlurEffect *overlayBlur;

@property (nonatomic, assign) BOOL dismissOnBlackOverlayTap; // default is YES.
@property (nonatomic, assign) BOOL showBlackOverlay; // default is YES.

@property (nonatomic, assign) BOOL highlightFromView;
@property (nonatomic, assign) CGFloat highlightCornerRadius;

@end

多谢观看