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 {}

- (ASPopover *)btnPopover { if (!_btnPopover) { ASPopoverOption *option = [[ASPopoverOption alloc] init]; option.popoverType = ASPopoverTypeUp; option.autoAjustDirection = NO; 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 = NO; option.arrowSize = CGSizeMake(10, 6); option.blackOverlayColor = [UIColor clearColor]; option.sideEdge = 7; option.dismissOnBlackOverlayTap = YES; option.popoverColor = [[UIColor blackColor] colorWithAlphaComponent:0.7]; option.autoAjustDirection = YES; option.animationIn = 0.4; option.springDamping = 0.5; option.initialSpringVelocity = 1; option.overlayBlur = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight]; //... _itemPopover = [[ASPopover alloc] initWithOption:option]; } return _itemPopover;}

- (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]; CGPoint originPoint = [self.itemPopover originArrowPointWithView:view fromView:itemView]; originPoint.y += 5; [self.itemPopover show:view atPoint:originPoint]; }}@end

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

PopoverOption Interfacetypedef NS_ENUM(NSInteger, ASPopoverType) { ASPopoverTypeUp = 0, ASPopoverTypeDown,};@interface ASPopoverOption : NSObject@property (nonatomic, assign) CGSize arrowSize;@property (nonatomic, assign) NSTimeInterval animationIn; // if 0, no animation@property (nonatomic, assign) NSTimeInterval animationOut;@property (nonatomic, assign) CGFloat cornerRadius;@property (nonatomic, assign) CGFloat sideEdge;@property (nonatomic, strong) UIColor *blackOverlayColor;@property (nonatomic, strong) UIBlurEffect *overlayBlur;@property (nonatomic, strong) UIColor *popoverColor;@property (nonatomic, assign) BOOL dismissOnBlackOverlayTap;@property (nonatomic, assign) BOOL showBlackOverlay;@property (nonatomic, assign) CGFloat springDamping;@property (nonatomic, assign) CGFloat initialSpringVelocity;@property (nonatomic, assign) ASPopoverType popoverType;@property (nonatomic, assign) BOOL highlightFromView;@property (nonatomic, assign) CGFloat highlightCornerRadius;@property (nonatomic, assign) BOOL autoAjustDirection; // down preferred, effect just in view not at point@end