首先，涉及访问相册权限：
需在“plist”文件里，输入如下代码！！
<!-- 相册 -->
<key>NSPhotoLibraryUsageDescription</key>
<string>APP需要您的同意,才能访问相册</string> <!-- 描述字符串 ⭐️可随意填，但必须填 -->
初次使用：
创建九宫格图片选择器视图：SudokuAddImageView
在“SudokuAddImageView.h”文件：
#import <UIKit/UIKit.h>
@interface SudokuAddImageView : UIView
/** 存储所有的照片(UIImage) */
@property (nonatomic, strong) NSMutableArray *images;
/** 选择照片是否有编辑框 */
@property (nonatomic,assign) BOOL allowEdit;
@end
在“SudokuAddImageView.m”文件：
#define SCREEN_WIDTH ([UIScreen mainScreen].bounds.size.width) //屏宽
#define imageH (SCREEN_WIDTH*210.f/750.f) // 图片高度
#define imageW (SCREEN_WIDTH*210.f/750.f) // 图片宽度
#define deleImageWH (SCREEN_WIDTH*35.f/750.f) // 删除按钮的宽高
#define kMaxColumn 3 // 每行显示数量
#define MaxImageCount 9 // 最多显示图片个数
#define kAdeleImage @"ic_not_pass" // 删除按钮图片
#define kAddImage @"pic_upload_forTotalBtn" // 添加按钮图片
@interface SudokuAddImageView () <UIImagePickerControllerDelegate>
{
//标识被编辑的按钮 -1 为添加新的按钮
NSInteger editTag;
}
@end
@implementation SudokuAddImageView
- (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
{
// 标识为添加一个新的图片
if (![self deleClose:btn]) {
editTag = -1;
[self callImagePicker];
}
}
// 修改旧的控件
- (void)changeOld:(UIButton *)btn
{
// 标识为修改(tag为修改标识)
if (![self deleClose:btn]) {
editTag = btn.tag;
[self callImagePicker];
}
}
// 移除"删除按钮"
- (BOOL)deleClose:(UIButton *)btn
{
if (btn.subviews.count == 2) {
[[btn.subviews lastObject] removeFromSuperview];
[self stop:btn];
return YES;
}
return NO;
}
// 调用图片选择器
- (void)callImagePicker
{
UIImagePickerController *pc = [[UIImagePickerController alloc] init];
pc.allowsEditing = _allowEdit?_allowEdit:NO;
pc.delegate = self;
[self.window.rootViewController presentViewController:pc animated:YES completion:nil];
}
// 根据图片名称或者图片对象 创建一个新的显示控件
- (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;
// 添加长按手势,用作删除
if(addBtn.tag != 0) {
UILongPressGestureRecognizer *gester = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)];
[addBtn addGestureRecognizer:gester];
}
return addBtn;
}
// 长按添加删除按钮
- (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];
}
}
// 长按开始抖动
- (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;
// 动画的重复执行次数
anim.repeatCount = MAXFLOAT;
// 保持动画执行完毕后的状态
anim.removedOnCompletion = NO;
anim.fillMode = kCAFillModeForwards;
[btn.layer addAnimation:anim forKey:@"shake"];
}
// 停止抖动
- (void)stop : (UIButton *)btn{
[btn.layer removeAnimationForKey:@"shake"];
}
// 删除图片
- (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];
}
}
// 对所有子控件进行布局
- (void)layoutSubviews
{
[super layoutSubviews];
NSInteger 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 - UIImagePickerControllerDelegate
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
UIImage *image;
if (_allowEdit == YES) { //可编辑
image = info[UIImagePickerControllerEditedImage]; //编辑后的图片
} else { //不可编辑
image = info[UIImagePickerControllerOriginalImage]; //原始的图片
}
if (editTag == -1) {
// 创建一个新的控件
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 {
// 根据tag修改需要编辑的控件
UIButton *btn = (UIButton *)[self viewWithTag:editTag];
NSInteger index = [self.images indexOfObject:[btn imageForState:UIControlStateNormal]];
[self.images removeObjectAtIndex:index];
[btn setImage:image forState:UIControlStateNormal];
[self.images insertObject:image atIndex:index];
}
// 退出图片选择控制器
[picker dismissViewControllerAnimated:YES completion:nil];
}
使用
在ViewController里：
包含头文件：#import "SudokuAddImageView.h" //头文件
SudokuAddImageView * addImg_V = [[SudokuAddImageView alloc] init];
//addImg_V.allowEdit = YES; //是否可编辑(含编辑框)
addImg_V.frame = CGRectMake(0, 20, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.width);
[self.view addSubview:addImg_V];
效果：
当然删除按钮，根据需求添加！！我使用的是长按手势！
之前的需求是在界面点击图片后，可选择更换，还是删除当前图片！
代码地址：https://github.com/Goyohol/FunctionRealize/tree/master/SukodePicturePicker
