在开发中，经常用到选择多张图片进行上传或作其他处理等等，以下DEMO满足了此功能中的大部分功能，可直接使用到项目中。
主要功能如下：
1，图片九宫格排列（可自动设置）
2，图片长按抖动（仿苹果软件删除时，图标抖动效果），可进入删除状态，再次单击进入普通状态
3，图片设置最大上限，加号按钮自动隐藏
4，已选图片可单击进行重新选择
5，无需代理，直接调用对应属性就可获取所有图片，并与显示顺序保持一致
效果图如下：
1 // 2 // SZAddImage.h 3 // addImage 4 // 5 // Created by mac on 14-5-21. 6 // Copyright (c) 2014年 shunzi. All rights reserved. 7 // 8 9 /** 10 * 使用说明:直接创建此view添加到你需要放置的位置即可. 11 * 属性images可以获取到当前选中的所有图片对象. 12 */ 13 14 #import <UIKit/UIKit.h> 15 16 @interface SZAddImage : UIView 17 18 /** 19 * 存储所有的照片(UIImage) 20 */ 21 @property (nonatomic, strong) NSMutableArray *images; 22 23 @end
1 // 2 // SZAddImage.m 3 // addImage 4 // 5 // Created by mac on 14-5-21. 6 // Copyright (c) 2014年 shunzi. All rights reserved. 7 // 8 9 #define imageH 100 // 图片高度 10 #define imageW 75 // 图片宽度 11 #define kMaxColumn 3 // 每行显示数量 12 #define MaxImageCount 9 // 最多显示图片个数 13 #define deleImageWH 25 // 删除按钮的宽高 14 #define kAdeleImage @"close.png" // 删除按钮图片 15 #define kAddImage @"add.png" // 添加按钮图片 16 17 18 19 #import "SZAddImage.h" 20 @interface SZAddImage()<UINavigationControllerDelegate, UIImagePickerControllerDelegate> 21 { 22 // 标识被编辑的按钮 -1 为添加新的按钮 23 NSInteger editTag; 24 } 25 @end 26 27 @implementation SZAddImage 28 29 - (id)initWithFrame:(CGRect)frame 30 { 31 self = [super initWithFrame:frame]; 32 if (self) { 33 UIButton *btn = [self createButtonWithImage:kAddImage andSeletor:@selector(addNew:)]; 34 [self addSubview:btn]; 35 } 36 return self; 37 } 38 39 -(NSMutableArray *)images 40 { 41 if (_images == nil) { 42 _images = [NSMutableArray array]; 43 } 44 return _images; 45 } 46 47 // 添加新的控件 48 - (void)addNew:(UIButton *)btn 49 { 50 // 标识为添加一个新的图片 51 52 if (![self deleClose:btn]) { 53 editTag = -1; 54 [self callImagePicker]; 55 } 56 57 58 } 59 60 // 修改旧的控件 61 - (void)changeOld:(UIButton *)btn 62 { 63 // 标识为修改(tag为修改标识) 64 if (![self deleClose:btn]) { 65 editTag = btn.tag; 66 [self callImagePicker]; 67 } 68 } 69 70 // 删除"删除按钮" 71 - (BOOL)deleClose:(UIButton *)btn 72 { 73 if (btn.subviews.count == 2) { 74 [[btn.subviews lastObject] removeFromSuperview]; 75 [self stop:btn]; 76 return YES; 77 } 78 79 return NO; 80 } 81 82 // 调用图片选择器 83 - (void)callImagePicker 84 { 85 UIImagePickerController *pc = [[UIImagePickerController alloc] init]; 86 pc.allowsEditing = YES; 87 pc.delegate = self; 88 [self.window.rootViewController presentViewController:pc animated:YES completion:nil]; 89 } 90 91 92 // 根据图片名称或者图片创建一个新的显示控件 93 - (UIButton *)createButtonWithImage:(id)imageNameOrImage andSeletor : (SEL)selector 94 { 95 UIImage *addImage = nil; 96 if ([imageNameOrImage isKindOfClass:[NSString class]]) { 97 addImage = [UIImage imageNamed:imageNameOrImage]; 98 } 99 else if([imageNameOrImage isKindOfClass:[UIImage class]]) 100 { 101 addImage = imageNameOrImage; 102 } 103 UIButton *addBtn = [UIButton buttonWithType:UIButtonTypeCustom]; 104 [addBtn setImage:addImage forState:UIControlStateNormal]; 105 [addBtn addTarget:self action:selector forControlEvents:UIControlEventTouchUpInside]; 106 addBtn.tag = self.subviews.count; 107 108 // 添加长按手势,用作删除.加号按钮不添加 109 if(addBtn.tag != 0) 110 { 111 UILongPressGestureRecognizer *gester = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)]; 112 [addBtn addGestureRecognizer:gester]; 113 } 114 return addBtn; 115 116 } 117 118 119 // 长按添加删除按钮 120 - (void)longPress : (UIGestureRecognizer *)gester 121 { 122 if (gester.state == UIGestureRecognizerStateBegan) 123 { 124 UIButton *btn = (UIButton *)gester.view; 125 126 UIButton *dele = [UIButton buttonWithType:UIButtonTypeCustom]; 127 dele.bounds = CGRectMake(0, 0, deleImageWH, deleImageWH); 128 [dele setImage:[UIImage imageNamed:kAdeleImage] forState:UIControlStateNormal]; 129 [dele addTarget:self action:@selector(deletePic:) forControlEvents:UIControlEventTouchUpInside]; 130 dele.frame = CGRectMake(btn.frame.size.width - dele.frame.size.width, 0, dele.frame.size.width, dele.frame.size.height); 131 132 [btn addSubview:dele]; 133 [self start : btn]; 134 135 136 } 137 138 } 139 140 // 长按开始抖动 141 - (void)start : (UIButton *)btn { 142 double angle1 = -5.0 / 180.0 * M_PI; 143 double angle2 = 5.0 / 180.0 * M_PI; 144 CAKeyframeAnimation *anim = [CAKeyframeAnimation animation]; 145 anim.keyPath = @"transform.rotation"; 146 147 anim.values = @[@(angle1), @(angle2), @(angle1)]; 148 anim.duration = 0.25; 149 // 动画的重复执行次数 150 anim.repeatCount = MAXFLOAT; 151 152 // 保持动画执行完毕后的状态 153 anim.removedOnCompletion = NO; 154 anim.fillMode = kCAFillModeForwards; 155 156 [btn.layer addAnimation:anim forKey:@"shake"]; 157 } 158 159 // 停止抖动 160 - (void)stop : (UIButton *)btn{ 161 [btn.layer removeAnimationForKey:@"shake"]; 162 } 163 164 // 删除图片 165 - (void)deletePic : (UIButton *)btn 166 { 167 [self.images removeObject:[(UIButton *)btn.superview imageForState:UIControlStateNormal]]; 168 [btn.superview removeFromSuperview]; 169 if ([[self.subviews lastObject] isHidden]) { 170 [[self.subviews lastObject] setHidden:NO]; 171 } 172 173 174 } 175 176 // 对所有子控件进行布局 177 - (void)layoutSubviews 178 { 179 [super layoutSubviews]; 180 int count = self.subviews.count; 181 CGFloat btnW = imageW; 182 CGFloat btnH = imageH; 183 int maxColumn = kMaxColumn > self.frame.size.width / imageW ? self.frame.size.width / imageW : kMaxColumn; 184 CGFloat marginX = (self.frame.size.width - maxColumn * btnW) / (count + 1); 185 CGFloat marginY = marginX; 186 for (int i = 0; i < count; i++) { 187 UIButton *btn = self.subviews[i]; 188 CGFloat btnX = (i % maxColumn) * (marginX + btnW) + marginX; 189 CGFloat btnY = (i / maxColumn) * (marginY + btnH) + marginY; 190 btn.frame = CGRectMake(btnX, btnY, btnW, btnH); 191 } 192 193 } 194 195 #pragma mark - UIImagePickerController 代理方法 196 -(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info 197 { 198 UIImage *image = info[UIImagePickerControllerEditedImage]; 199 if (editTag == -1) { 200 // 创建一个新的控件 201 UIButton *btn = [self createButtonWithImage:image andSeletor:@selector(changeOld:)]; 202 [self insertSubview:btn atIndex:self.subviews.count - 1]; 203 [self.images addObject:image]; 204 if (self.subviews.count - 1 == MaxImageCount) { 205 [[self.subviews lastObject] setHidden:YES]; 206 207 } 208 } 209 else 210 { 211 // 根据tag修改需要编辑的控件 212 UIButton *btn = (UIButton *)[self viewWithTag:editTag]; 213 int index = [self.images indexOfObject:[btn imageForState:UIControlStateNormal]]; 214 [self.images removeObjectAtIndex:index]; 215 [btn setImage:image forState:UIControlStateNormal]; 216 [self.images insertObject:image atIndex:index]; 217 } 218 // 退出图片选择控制器 219 [picker dismissViewControllerAnimated:YES completion:nil]; 220 } 221 222 223 224 @end
一个iOS图片选择器的DEMO(实现图片添加，宫格排列，图片长按删除，以及图片替换等功能),布布扣,bubuko.com