在開發中，經常用到選擇多張圖片進行上傳或作其他處理等等，以下DEMO滿足了此功能中的大部分功能，可直接使用到項目中。
主要功能如下：
1，圖片九宮格排列（可自動設置）
2，圖片長按抖動（仿蘋果軟件刪除時，圖標抖動效果），可進入刪除狀態，再次單擊進入普通狀態
3，圖片設置最大上限，加號按鈕自動隱藏
4，已選圖片可單擊進行重新選擇
5，無需代理，直接調用對應屬性就可獲取所有圖片，并與顯示順序保持一致
效果圖如下：
1463654534962534.png
1463654534494263.png
1463654536105169.png
//
// SZAddImage.h
// addImage
//
// Created by mac on 14-5-21.
// Copyright (c) 2014年 shunzi. All rights reserved.
//
/**
* 使用說明:直接創建此view添加到你需要放置的位置即可.
* 屬性images可以獲取到當前選中的所有圖片對象.
*/
#import <UIKit/UIKit.h>
@interface SZAddImage : UIView
/**
* 存儲所有的照片(UIImage)
*/
@property (nonatomic, strong) NSMutableArray *images;
@end
//
// SZAddImage.m
// addImage
//
// Created by mac on 14-5-21.
// Copyright (c) 2014年 shunzi. All rights reserved.
//
#define imageH 100 // 圖片高度
#define imageW 75 // 圖片寬度
#define kMaxColumn 3 // 每行顯示數量
#define MaxImageCount 9 // 最多顯示圖片個數
#define deleImageWH 25 // 刪除按鈕的寬高
#define kAdeleImage @"close.png" // 刪除按鈕圖片
#define kAddImage @"add.png" // 添加按鈕圖片
#import "SZAddImage.h"
@interface SZAddImage()<UINavigationControllerDelegate, UIImagePickerControllerDelegate>
{
// 標識被編輯的按鈕 -1 為添加新的按鈕
NSInteger editTag;
}
@end
@implementation SZAddImage
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
UIButton *btn = [self createButtonWithImage:kAddImage andSeletor:@selector(addNew:)];
[self addSubview:btn];
}
return self;
}
-(NSMutableArray *)images
{
if (_images == nil) {
_images = [NSMutableArray array];
}
return _images;
}
// 添加新的控件
- (void)addNew:(UIButton *)btn
{
// 標識為添加一個新的圖片
if (![self deleClose:btn]) {
editTag = -1;
[self callImagePicker];
}
}
// 修改舊的控件
- (void)changeOld:(UIButton *)btn
{
// 標識為修改(tag為修改標識)
if (![self deleClose:btn]) {
editTag = btn.tag;
[self callImagePicker];
}
}
// 刪除"刪除按鈕"
- (BOOL)deleClose:(UIButton *)btn
{
if (btn.subviews.count == 2) {
[[btn.subviews lastObject] removeFromSuperview];
[self stop:btn];
return YES;
}
return NO;
}
// 調用圖片選擇器
- (void)callImagePicker
{
UIImagePickerController *pc = [[UIImagePickerController alloc] init];
pc.allowsEditing = YES;
pc.delegate = self;
[self.window.rootViewController presentViewController:pc animated:YES completion:nil];
}
// 根據圖片名稱或者圖片創建一個新的顯示控件
- (UIButton *)createButtonWithImage:(id)imageNameOrImage andSeletor : (SEL)selector
{
UIImage *addImage = nil;
if ([imageNameOrImage isKindOfClass:[NSString class]]) {
addImage = [UIImage imageNamed:imageNameOrImage];
}
else if([imageNameOrImage isKindOfClass:[UIImage class]])
{
addImage = imageNameOrImage;
}
UIButton *addBtn = [UIButton buttonWithType:UIButtonTypeCustom];
[addBtn setImage:addImage forState:UIControlStateNormal];
[addBtn addTarget:self action:selector forControlEvents:UIControlEventTouchUpInside];
addBtn.tag = self.subviews.count;
// 添加長按手勢,用作刪除.加號按鈕不添加
if(addBtn.tag != 0)
{
UILongPressGestureRecognizer *gester = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)];
[addBtn addGestureRecognizer:gester];
}
return addBtn;
}
// 長按添加刪除按鈕
- (void)longPress : (UIGestureRecognizer *)gester
{
if (gester.state == UIGestureRecognizerStateBegan)
{
UIButton *btn = (UIButton *)gester.view;
UIButton *dele = [UIButton buttonWithType:UIButtonTypeCustom];
dele.bounds = CGRectMake(0, 0, deleImageWH, deleImageWH);
[dele setImage:[UIImage imageNamed:kAdeleImage] forState:UIControlStateNormal];
[dele addTarget:self action:@selector(deletePic:) forControlEvents:UIControlEventTouchUpInside];
dele.frame = CGRectMake(btn.frame.size.width - dele.frame.size.width, 0, dele.frame.size.width, dele.frame.size.height);
[btn addSubview:dele];
[self start : btn];
}
}
// 長按開始抖動
- (void)start : (UIButton *)btn {
double angle1 = -5.0 / 180.0 * M_PI;
double angle2 = 5.0 / 180.0 * M_PI;
CAKeyframeAnimation *anim = [CAKeyframeAnimation animation];
anim.keyPath = @"transform.rotation";
anim.values = @[@(angle1), @(angle2), @(angle1)];
anim.duration = 0.25;
// 動畫的重復執行次數
anim.repeatCount = MAXFLOAT;
// 保持動畫執行完畢后的狀態
anim.removedOnCompletion = NO;
anim.fillMode = kCAFillModeForwards;
[btn.layer addAnimation:anim forKey:@"shake"];
}
// 停止抖動
- (void)stop : (UIButton *)btn{
[btn.layer removeAnimationForKey:@"shake"];
}
// 刪除圖片
- (void)deletePic : (UIButton *)btn
{
[self.images removeObject:[(UIButton *)btn.superview imageForState:UIControlStateNormal]];
[btn.superview removeFromSuperview];
if ([[self.subviews lastObject] isHidden]) {
[[self.subviews lastObject] setHidden:NO];
}
}
// 對所有子控件進行布局
- (void)layoutSubviews
{
[super layoutSubviews];
int count = self.subviews.count;
CGFloat btnW = imageW;
CGFloat btnH = imageH;
int maxColumn = kMaxColumn > self.frame.size.width / imageW ? self.frame.size.width / imageW : kMaxColumn;
CGFloat marginX = (self.frame.size.width - maxColumn * btnW) / (count + 1);
CGFloat marginY = marginX;
for (int i = 0; i < count; i++) {
UIButton *btn = self.subviews[i];
CGFloat btnX = (i % maxColumn) * (marginX + btnW) + marginX;
CGFloat btnY = (i / maxColumn) * (marginY + btnH) + marginY;
btn.frame = CGRectMake(btnX, btnY, btnW, btnH);
}
}
#pragma mark - UIImagePickerController 代理方法
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
UIImage *image = info[UIImagePickerControllerEditedImage];
if (editTag == -1) {
// 創建一個新的控件
UIButton *btn = [self createButtonWithImage:image andSeletor:@selector(changeOld:)];
[self insertSubview:btn atIndex:self.subviews.count - 1];
[self.images addObject:image];
if (self.subviews.count - 1 == MaxImageCount) {
[[self.subviews lastObject] setHidden:YES];
}
}
else
{
// 根據tag修改需要編輯的控件
UIButton *btn = (UIButton *)[self viewWithTag:editTag];
int index = [self.images indexOfObject:[btn imageForState:UIControlStateNormal]];
[self.images removeObjectAtIndex:index];
[btn setImage:image forState:UIControlStateNormal];
[self.images insertObject:image atIndex:index];
}
// 退出圖片選擇控制器
[picker dismissViewControllerAnimated:YES completion:nil];
}
@end
