#import <UIKit/UIKit.h>
@interface DPopoverView : UIView
+ (void)showPopoverAtPoint:(CGPoint)point inView:(UIView *)view withContentView:(UIView *)cView;
- (void)showPopoverAtPoint:(CGPoint)point inView:(UIView *)view withContentView:(UIView *)cView;
- (void)dismiss;
@end
#import "DPopoverView.h"
@interface DPopoverView()
@property (nonatomic, strong) UIView *contentView;
@property (nonatomic, assign) CGRect boxFrame;
@end
@implementation DPopoverView
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
self.backgroundColor = [UIColor clearColor];
}
return self;
}
+ (void)showPopoverAtPoint:(CGPoint)point inView:(UIView *)view withContentView:(UIView *)cView
{
DPopoverView *popView = [[DPopoverView alloc] initWithFrame:CGRectZero];
[popView showPopoverAtPoint:point inView:view withContentView:cView];
}
- (void)showPopoverAtPoint:(CGPoint)point inView:(UIView *)view withContentView:(UIView *)cView
{
self.boxFrame = cView.frame;
self.contentView = cView;
UIWindow *window = [UIApplication sharedApplication].keyWindow;
if(!window) {
window = [[UIApplication sharedApplication].windows objectAtIndex:0];
}
UIView *topView = window;
CGPoint topPoint = [topView convertPoint:point fromView:view];
CGRect topViewBounds = topView.bounds;
_contentView.frame = _boxFrame;
_contentView.hidden = NO;
[self addSubview:_contentView];
self.layer.anchorPoint = CGPointMake(topPoint.x / topViewBounds.size.width, topPoint.y / topViewBounds.size.height);
self.frame = topViewBounds;
[self setNeedsDisplay];
[topView addSubview:self];
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapped:)];
[self addGestureRecognizer:tap];
self.userInteractionEnabled = YES;
self.alpha = 0.f;
self.transform = CGAffineTransformMakeScale(0.1f, 0.1f);
[UIView animateWithDuration:0.2f delay:0.f options:UIViewAnimationOptionCurveEaseInOut animations:^{
self.alpha = 1.f;
self.transform = CGAffineTransformMakeScale(1.05f, 1.05f);
} completion:^(BOOL finished) {
[UIView animateWithDuration:0.08f delay:0.f options:UIViewAnimationOptionCurveEaseInOut animations:^{
self.transform = CGAffineTransformIdentity;
} completion:nil];
}];
}
//#define kGradientTopColor [UIColor colorWithWhite:1.f alpha:0.95]
//#define kGradientBottomColor [UIColor colorWithWhite:0.98f alpha:0.95]
#define kGradientTopColor [UIColor clearColor]
#define kGradientBottomColor [UIColor clearColor]
- (void)drawRect:(CGRect)rect
{
// Drawing code
CGRect frame = _boxFrame;
float xMin = CGRectGetMinX(frame);
float yMin = CGRectGetMinY(frame);
float xMax = CGRectGetMaxX(frame);
float yMax = CGRectGetMaxY(frame);
float radius = 4.f;
float cpOffset = 1.8f;
UIBezierPath *popoverPath = [UIBezierPath bezierPath];
[popoverPath moveToPoint:CGPointMake(CGRectGetMinX(frame), CGRectGetMinY(frame) + radius)];//
[popoverPath addCurveToPoint:CGPointMake(xMin + radius, yMin) controlPoint1:CGPointMake(xMin, yMin + radius - cpOffset) controlPoint2:CGPointMake(xMin + radius - cpOffset, yMin)];//
[popoverPath addLineToPoint:CGPointMake(xMax - radius, yMin)];
[popoverPath addCurveToPoint:CGPointMake(xMax, yMin + radius) controlPoint1:CGPointMake(xMax - radius + cpOffset, yMin) controlPoint2:CGPointMake(xMax, yMin + radius - cpOffset)];//
[popoverPath addLineToPoint:CGPointMake(xMax, yMax - radius)];
[popoverPath addCurveToPoint:CGPointMake(xMax - radius, yMax) controlPoint1:CGPointMake(xMax, yMax - radius + cpOffset) controlPoint2:CGPointMake(xMax - radius + cpOffset, yMax)];//
[popoverPath addLineToPoint:CGPointMake(xMin + radius, yMax)];
[popoverPath addCurveToPoint:CGPointMake(xMin, yMax - radius) controlPoint1:CGPointMake(xMin + radius - cpOffset, yMax) controlPoint2:CGPointMake(xMin, yMax - radius + cpOffset)];//
[popoverPath closePath];
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef context = UIGraphicsGetCurrentContext();
UIColor* shadow = [UIColor colorWithWhite:0.f alpha:0.4f];
CGSize shadowOffset = CGSizeMake(0, 1);
CGFloat shadowBlurRadius = 10;
NSArray* gradientColors = [NSArray arrayWithObjects:
(id)kGradientTopColor.CGColor,
(id)kGradientBottomColor.CGColor, nil];
CGFloat gradientLocations[] = {0, 1};
CGGradientRef gradient = CGGradientCreateWithColors(colorSpace, (CFArrayRef)gradientColors, gradientLocations);
float bottomOffset = 0.f;
float topOffset = 0.f;
CGContextSaveGState(context);
CGContextSetShadowWithColor(context, shadowOffset, shadowBlurRadius, shadow.CGColor);
CGContextBeginTransparencyLayer(context, NULL);
[popoverPath addClip];
CGContextDrawLinearGradient(context, gradient, CGPointMake(CGRectGetMidX(frame), CGRectGetMinY(frame) - topOffset), CGPointMake(CGRectGetMidX(frame), CGRectGetMaxY(frame) + bottomOffset), 0);
CGContextEndTransparencyLayer(context);
CGContextRestoreGState(context);
CGGradientRelease(gradient);
CGColorSpaceRelease(colorSpace);
}
- (void)tapped:(UITapGestureRecognizer *)tap
{
[self dismiss];
}
- (void)dismiss {
[UIView animateWithDuration:0.3f animations:^{
self.alpha = 0.1f;
self.transform = CGAffineTransformMakeScale(0.1f, 0.1f);
} completion:^(BOOL finished) {
[self removeFromSuperview];
}];
}
@end
使用示例:
{
ButtonSelectControl *buttonSelectControl_= [[ButtonSelectControl alloc] initWithFrame:CGRectMake(ScreenWidth - 80, [Utility getNavBarHight],80, 80) direction:YES];
buttonSelectControl_.delegate = self;
buttonSelectControl_.normalColor = [UIColor colorWithRed:103/255.0f green:103/255.0f blue:103/255.0f alpha:1.0f];
buttonSelectControl_.selectColor = [UIColor whiteColor];
buttonSelectControl_.fSelFontSize = 12;
[buttonSelectControl_ setBackgroundColor:MainTitleBgColor];
CGFloat width, hight;
width = buttonSelectControl_.frame.size.width;
hight = buttonSelectControl_.frame.size.height /3;
UIEdgeInsets edgeinset =UIEdgeInsetsMake(0,0,0,15);
UIButton *btn0 = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 80, 40)];
btn0.imageEdgeInsets = edgeinset;
[btn0 setImage:[UIImage imageNamed:@"二维码-up"] forState:UIControlStateNormal];
[btn0 setImage:[UIImage imageNamed:@"二维码-down"] forState:UIControlStateHighlighted];
[btn0 setTitle:@"扫一扫" forState:UIControlStateNormal];
[btn0 setTitle:@"扫一扫" forState:UIControlStateHighlighted];
[btn0.titleLabel setFont:[UIFont systemFontOfSize:16.0f]];
btn0.tag = MV_Btn_QRCode_tag;
[buttonSelectControl_ addButton:btn0];
UIButton *btn1 = [[UIButton alloc] initWithFrame:CGRectMake(0,40,
CGRectGetWidth(btn0.frame),
CGRectGetHeight(btn0.frame))];
[btn1 setImage:[UIImage imageNamed:@"ic_setting_up"] forState:UIControlStateNormal];
btn1.imageEdgeInsets = edgeinset;
[btn1 setTitle:@"设置" forState:UIControlStateNormal];
[btn1 setTitle:@"设置" forState:UIControlStateHighlighted];
[btn1.titleLabel setFont:[UIFont systemFontOfSize:16.0f]];
btn1.tag =MV_Btn_setting_tag;
[buttonSelectControl_ addButton:btn1];
DPopoverView *popoverView1 = [[DPopoverView alloc] initWithFrame:CGRectZero];
popoverView = popoverView1;
[popoverView1 showPopoverAtPoint:CGPointMake(ScreenWidth - 20, [Utility getNavBarHight]/2) inView:self.view withContentView:buttonSelectControl_];
}
原文：http://www.cnblogs.com/ldc529/p/3862360.html