不规则形状的Mask动画

//
//  MaskShapeViewController.m
//  Animations
//
//  Created by YouXianMing on 16/7/10.
//  Copyright © 2016年 YouXianMing. All rights reserved.
//

#import "MaskShapeViewController.h"
#import "AppleSystemService.h"
#import "JSAnimatedImagesView.h"
#import "CutOutClearView.h"
#import "UIView+SetRect.h"
#import "UIFont+Fonts.h"
#import "FBShimmeringView.h"

typedef enum : NSUInteger {

kUpJsView = 1000,
kDownJsView,

} EMaskShapeViewControllerValue;

@interface MaskShapeViewController () <JSAnimatedImagesViewDataSource>

@property (nonatomic, strong) JSAnimatedImagesView  *upJsView;
@property (nonatomic, strong) NSArray               *upDataSource;

@property (nonatomic, strong) JSAnimatedImagesView  *downJsView;
@property (nonatomic, strong) NSArray               *downDataSource;

@end

@implementation MaskShapeViewController

- (void)setup {

[super setup];

self.backgroundView.backgroundColor = [UIColor blackColor];

CGFloat gap    = 4.f;
CGFloat offset = 50.f;

{
CutOutClearView *areaView = [[CutOutClearView alloc] initWithFrame:CGRectMake(0, 0, Width, self.contentView.height / 2.f + offset - gap)];
areaView.fillColor        = [UIColor clearColor];
areaView.areaColor        = [UIColor blackColor];

UIBezierPath *path = [UIBezierPath bezierPath];
[path moveToPoint:CGPointMake(gap, gap)];
[path addLineToPoint:CGPointMake(Width - gap, gap)];
[path addLineToPoint:CGPointMake(Width - gap, areaView.height)];
[path addLineToPoint:CGPointMake(gap, areaView.height - (offset - gap) * 2 - gap)];
[path closePath];
areaView.paths = @[path];

self.upDataSource = @[[UIImage imageNamed:@"1"],
[UIImage imageNamed:@"2"],
[UIImage imageNamed:@"3"],
[UIImage imageNamed:@"4"],
[UIImage imageNamed:@"5"]];

self.upJsView                     = [[JSAnimatedImagesView alloc] initWithFrame:CGRectMake(0, 0, Width, self.contentView.height / 2.f + offset - gap)];
self.upJsView.transitionDuration  = 2.f;
self.upJsView.tag                 = kUpJsView;
self.upJsView.dataSource          = self;
self.upJsView.layer.masksToBounds = YES;
self.upJsView.maskView            = areaView;
[self.contentView addSubview:self.upJsView];
}

{
CutOutClearView *areaView = [[CutOutClearView alloc] initWithFrame:CGRectMake(0, 0, Width, self.contentView.height / 2.f + (offset - gap))];
areaView.fillColor        = [UIColor clearColor];
areaView.areaColor        = [UIColor blackColor];

UIBezierPath *path = [UIBezierPath bezierPath];
[path moveToPoint:CGPointMake(gap, 0)];
[path addLineToPoint:CGPointMake(gap, areaView.height - gap)];
[path addLineToPoint:CGPointMake(Width - gap, areaView.height - gap)];
[path addLineToPoint:CGPointMake(Width - gap, (offset - gap) * 2 + gap)];
[path closePath];
areaView.paths = @[path];

self.downDataSource = @[[UIImage imageNamed:@"pic_1"],
[UIImage imageNamed:@"pic_2"],
[UIImage imageNamed:@"pic_3"],
[UIImage imageNamed:@"pic_4"]];

self.downJsView                     = [[JSAnimatedImagesView alloc] initWithFrame:CGRectMake(0, 0, Width, self.contentView.height / 2.f + offset - gap)];
self.downJsView.transitionDuration  = 2.f;
self.downJsView.tag                 = kDownJsView;
self.downJsView.dataSource          = self;
self.downJsView.layer.masksToBounds = YES;
self.downJsView.maskView            = areaView;

self.downJsView.bottom = self.contentView.height;
[self.contentView addSubview:self.downJsView];
}
}

#pragma mark - JSAnimatedImagesViewDataSource

- (NSUInteger)animatedImagesNumberOfImages:(JSAnimatedImagesView *)animatedImagesView {

NSUInteger count = 0;
animatedImagesView.tag == kUpJsView ? (count = self.upDataSource.count) : (count = self.downDataSource.count);

return count;
}

- (UIImage *)animatedImagesView:(JSAnimatedImagesView *)animatedImagesView imageAtIndex:(NSUInteger)index {

UIImage *image = nil;
animatedImagesView.tag == kUpJsView ? (image = self.upDataSource[index]) : (image = self.downDataSource[index]);

return image;
}

#pragma mark - Overwrite methods.

- (void)buildTitleView {

[super buildTitleView];

// Title label.
UILabel *headlinelabel      = [UILabel new];
headlinelabel.font          = [UIFont HeitiSCWithFontSize:20.f];
headlinelabel.textAlignment = NSTextAlignmentCenter;
headlinelabel.textColor     = [UIColor cyanColor];
headlinelabel.text          = self.title;
[headlinelabel sizeToFit];

headlinelabel.center = self.titleView.middlePoint;

FBShimmeringView *shimmeringView           = [[FBShimmeringView alloc] initWithFrame:self.titleView.bounds];
shimmeringView.shimmering                  = YES;
shimmeringView.shimmeringBeginFadeDuration = 0.3;
shimmeringView.shimmeringOpacity           = 0.1f;
shimmeringView.shimmeringAnimationOpacity  = 1.f;
[self.titleView addSubview:shimmeringView];

shimmeringView.contentView = headlinelabel;

// Line.
UIView *line         = [[UIView alloc] initWithFrame:CGRectMake(0, 63.5, self.view.width, 0.5f)];
line.backgroundColor = [[UIColor grayColor] colorWithAlphaComponent:0.25f];
[self.titleView addSubview:line];
[self.titleView addSubview:headlinelabel];

// Back button.
UIImage  *image      = [UIImage imageNamed:@"backIconVer2"];
UIButton *backButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 100, 64)];
backButton.center    = CGPointMake(20, self.titleView.middleY);
[backButton setImage:image forState:UIControlStateNormal];
[backButton addTarget:self action:@selector(popSelf) forControlEvents:UIControlEventTouchUpInside];
[backButton.imageView setContentMode:UIViewContentModeCenter];
[self.titleView addSubview:backButton];
}

- (void)popSelf {

[self popViewControllerAnimated:YES];
}

@end

//
//  CutOutClearView.h
//  Animations
//
//  Created by YouXianMing on 16/7/10.
//  Copyright © 2016年 YouXianMing. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface CutOutClearView : UIView

/**
*  The total fill color, you can used it as the view's background color.
*/
@property (nonatomic, strong) UIColor  *fillColor;

/**
*  The paths area color.
*/
@property (nonatomic, strong) UIColor  *areaColor;

/**
*  Path array.
*/
@property (nonatomic, strong) NSArray  <UIBezierPath *>  *paths;

@end

//
//  CutOutClearView.m
//  Animations
//
//  Created by YouXianMing on 16/7/10.
//  Copyright © 2016年 YouXianMing. All rights reserved.
//

#import "CutOutClearView.h"

@implementation CutOutClearView

- (instancetype)initWithFrame:(CGRect)frame {

if (self = [super initWithFrame:frame]) {

self.fillColor       = [UIColor whiteColor];
self.backgroundColor = [UIColor clearColor];
self.opaque          = NO;
}

return self;
}

- (void)drawRect:(CGRect)rect {

[super drawRect:rect];

[self.fillColor setFill];
UIRectFill(rect);

CGContextRef context = UIGraphicsGetCurrentContext();

if (self.areaColor && self.paths.count) {

UIBezierPath *path = nil;

for (int i = 0; i < self.paths.count; i++) {

i == 0 ? path = self.paths[i] : [path appendPath:self.paths[i]];
}

CGFloat red   = 0;
CGFloat green = 0;
CGFloat blue  = 0;
CGFloat alpha = 0;
[self.areaColor getRed:&red green:&green blue:&blue alpha:&alpha];

CGContextAddPath(context, path.CGPath);
CGContextSetRGBFillColor(context, red, green, blue, alpha);
CGContextFillPath(context);

} else {

for (UIBezierPath *path in self.paths) {

CGContextAddPath(context, path.CGPath);
CGContextSetBlendMode(context, kCGBlendModeClear);
CGContextFillPath(context);
}
}
}

@end