这段时间一直写关于小程序和Vue.js的文章，却忽略了自己的本职工作：IOS开发，听到IOS开发，貌似已经被这些容易上手的web端代替，但是，原生就是原生，它的页面流畅度及用户体验效果还是比较好的。在此，记录下用IOS 上传多张图片到阿里云的功能封装。
一.准备工作
2. 把demo中的AliyunOSSiOS.framework拖入工程
3.在控制器内引入头文件#import <AliyunOSSiOS/OSSService.h> (多次引入时放入全局引入)
4. 初始化阿里云对象@property (strong, nonatomic) OSSClient *client;
二.封装好的图片上传代码
AliyunOSSUpload.h文件
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#define AliyunUpload [AliyunOSSUpload aliyunInit]typedef enum{
ENT_fileImageHeader,//头像
ENT_fileImageBody,//个人图片
ENT_fileImageProject,//门店图片
ENT_fileImageJs,//店员展示图片
ENT_fileItemImageBody,//门店项目图片
}FileType;
@interface AliyunOSSUpload : NSObject
+(AliyunOSSUpload *)aliyunInit;
-(void)uploadImage:(NSArray*)imgArr FileDirectory:(FileType)type
success:(void (^)(NSString *obj))success;
@end上图定义的枚举代表上传不同类型的图片，根据公司要求，做一个图片功能上的区分，以根据图片名称很清楚知道代表什么类型。
AliyunOSSUpload.m文件
#import <AliyunOSSiOS/OSSService.h>
#import <AliyunOSSiOS/OSSCompat.h>
#import "AliyunOSSUpload.h"
NSString * const AccessKey = @"***";
NSString * const SecretKey = @"***";
NSString * const endPoint = @"https://oss-cn-qingdao.aliyuncs.com/";
OSSClient * client;
@implementation AliyunOSSUpload
static AliyunOSSUpload *_config;
+(AliyunOSSUpload *)aliyunInit{
@synchronized(self){
if (_config==nil) {
[OSSLog enableLog];
_config=[[AliyunOSSUpload alloc] init];
id<OSSCredentialProvider> credential =
[[OSSPlainTextAKSKPairCredentialProvider alloc]
initWithPlainTextAccessKey:AccessKey
secretKey:SecretKey];
client = [[OSSClient alloc] initWithEndpoint:endPoint
credentialProvider:credential];
}
} return _config;
}
//上传多张图片
-(void)uploadImage:(NSArray*)imgArr FileDirectory:(FileType)type
success:(void (^)(NSString *obj))success{
NSMutableArray *imgArray=[NSMutableArray new];
for (int i=0; i<imgArr.count; i++) {
NSData* data;
NSDictionary *imgDictionary = [imgArr objectAtIndex:i];
NSArray *imgValue = [imgDictionary allValues];
NSArray *imgKey = [imgDictionary allKeys];
UIImage *image1 = [imgValue objectAtIndex:0];
NSString *str = [imgKey objectAtIndex:0];
UIImage *image=[IHUtility rotateAndScaleImage:image1
maxResolution:(int)kScreenWidth*2];
OSSPutObjectRequest * put = [OSSPutObjectRequest new];
put.contentType=@"image/jpeg";
put.bucketName = @"yijiao";
NSString *imgName;
if (type==ENT_fileImageHeader) {
NSData *data1=UIImageJPEGRepresentation(image, 1);
float length1 = [data1 length]/1024;
if (length1<600) {
data = UIImageJPEGRepresentation(image, 1);
}else{ if ([IHUtility IsEnableWIFI]) {
data = UIImageJPEGRepresentation(image, 0.6);
}else{
data = UIImageJPEGRepresentation(image, 0.5);
}
}
imgName=[NSString stringWithFormat:@"ios/header/header_%@.jpg",[IHUtility getTransactionID]];
}else if (type==ENT_fileImageBody){
NSData *data1=UIImageJPEGRepresentation(image, 1);
float length1 = [data1 length]/1024;
if (length1<600) {
data = UIImageJPEGRepresentation(image, 1);
}else{
data = UIImageJPEGRepresentation(image, 0.5);
}
imgName=[NSString stringWithFormat:@"ios/content/body_%@/%@.jpg",str,[IHUtility getNowTimeTimestamp]];
}else if (type==ENT_fileImageJs)
{ NSData *data1=UIImageJPEGRepresentation(image, 1);
float length1 = [data1 length]/1024;
if (length1<600) {
data = UIImageJPEGRepresentation(image, 1);
}else{
data = UIImageJPEGRepresentation(image, 0.5);
}
imgName=[NSString stringWithFormat:@"js/header/header_%@.jpg",[IHUtility getTransactionID]];
}else if (type==ENT_fileImageProject){
NSData *data1=UIImageJPEGRepresentation(image, 1);
float length1 = [data1 length]/1024;
if (length1<600) {
data = UIImageJPEGRepresentation(image, 1);
}else{
data = UIImageJPEGRepresentation(image, 0.5);
}
imgName=[NSString stringWithFormat:@"ios/storePicture/web_%@/%@.jpg",str,[IHUtility getNowTimeTimestamp]];
}else if (type==ENT_fileItemImageBody){ NSData *data1=UIImageJPEGRepresentation(image, 1); float length1 = [data1 length]/1024; if (length1<600) {
data = UIImageJPEGRepresentation(image, 1);
}else{
data = UIImageJPEGRepresentation(image, 0.5);
}
imgName=[NSString stringWithFormat:@"ios/web/itemBody_%@/%@.jpg",str,[IHUtility getNowTimeTimestamp]];
}
put.objectKey = imgName;
put.uploadingData = data; // 直接上传NSData
put.uploadProgress = ^(int64_t bytesSent, int64_t totalByteSent, int64_t totalBytesExpectedToSend) { NSLog(@"%lld, %lld, %lld", bytesSent, totalByteSent, totalBytesExpectedToSend);
};
NSString *imgWidth;
NSString *imgHeigh;
if (type==ENT_fileImageHeader) {
imgWidth=[NSString stringWithFormat:@"%d",(int)kScreenWidth];
imgHeigh=[NSString stringWithFormat:@"%d",(int)kScreenWidth];
} else if (type==ENT_fileImageBody){
imgWidth=[NSString stringWithFormat:@"%lf",image.size.width];
imgHeigh=[NSString stringWithFormat:@"%lf",image.size.height];
} else if (type==ENT_fileImageJs){
imgWidth=[NSString stringWithFormat:@"%lf",image.size.width];
imgHeigh=[NSString stringWithFormat:@"%lf",image.size.height];
}else if (type==ENT_fileImageProject){
imgWidth=[NSString stringWithFormat:@"%lf",image.size.width];
imgHeigh=[NSString stringWithFormat:@"%lf",image.size.height];
}else if (type==ENT_fileItemImageBody){
imgWidth=[NSString stringWithFormat:@"%lf",image.size.width];
imgHeigh=[NSString stringWithFormat:@"%lf",image.size.height];
}
NSDictionary *dic=[NSDictionary dictionaryWithObjectsAndKeys:[NSString
stringWithFormat:@"/%@",imgName],@"t_url",
imgWidth,@"t_width",
imgHeigh,@"t_height", nil];
[imgArray addObject:dic];
if (client==nil) {
id<OSSCredentialProvider> credential =
[[OSSPlainTextAKSKPairCredentialProvider alloc] initWithPlainTextAccessKey
:AccessKey secretKey:SecretKey];
client = [[OSSClient alloc] initWithEndpoint:endPoint
credentialProvider:credential];
}
OSSTask * putTask = [client putObject:put];
[putTask continueWithBlock:^id(OSSTask *task) {
if (!task.error) {
NSLog(@"upload object success!");
if (type==ENT_fileImageHeader) {
NSString *str=[NSString stringWithFormat:@"/%@",imgName];
success(str);
} else if (type==ENT_fileImageBody){
if (i==imgArr.count-1) {
NSString *str=[imgArray JSONRepresentation];
success(str);
}
}else if (type==ENT_fileImageJs){
success(imgName);
} else if (type==ENT_fileImageProject){
if (i==imgArr.count-1) {
NSString *str=[imgArray JSONRepresentation];
success(str);
}
}else if (type==ENT_fileItemImageBody){
success(imgName);
}
} else{
[YJTipView showBottomWithText:@"图片上传失败,请重试" bottomOffset:300 duration:1.5f];
NSLog(@"upload object failed, error: %@" , task.error);
} return nil;
}];
}
}详细讲解如下：
NSString * const AccessKey = @"***"; NSString * const SecretKey = @"***"; NSString * const endPoint = @"
参数AccessKey,SecretKey,endPoint 是注册阿里云账号后，从阿里云控制台拿到的数据，为安全起见，这几个数据最好放在自己的服务器上，前端从服务器上获取。
+(AliyunOSSUpload *)aliyunInit
因为OSSClient是OSS服务的iOS客户端，它为调用者提供了一系列的方法，用于和OSS服务进行交互。一般来说，全局内只需要保持一个OSSClient，用来调用各种操作。所以定义全局方法。
put.contentType=@"image/jpeg"; put.bucketName = @"yijiao"; put.objectKey = @"自己的数据";
contentType代表上传图片类型，也可上传视频video/mp4
bucketName代表储存文件的区域，就是放在阿里云服务器里的文件名。
objectKey代表存储在文件区域内的对象，即 阿里云返回的图片名。
put.uploadingData = self.imageData;//自己的NSData数据
因为阿里云不支持同时上传多张图片，所以我们在上传的时候用for语句来循环上传，uploadingData就是接受图片data数据。
put.uploadProgress = ^(int64_t bytesSent, int64_t totalByteSent, int64_t totalBytesExpectedToSend) {
NSLog(@"%lld, %lld, %lld", bytesSent, totalByteSent, totalBytesExpectedToSend);
//当前上传段长度、当前已经上传总长度、一共需要上传的总长度
};阿里云提供了上传图片的总长度，及当前上传的长度，当我们有需要计算上传图片的进度的需求，就可以利用这些字段很容易的完成。
NSData *data1=UIImageJPEGRepresentation(image, 1);
float length1 = [data1 length]/1024;
if (length1<600) {
data = UIImageJPEGRepresentation(image, 1);
}else{
if ([IHUtility IsEnableWIFI]) {
data = UIImageJPEGRepresentation(image, 0.6);
}else{
data = UIImageJPEGRepresentation(image, 0.5);
}
}上传图片时，有的图片比较大，我们需要按比例压缩下，上面代码就是压缩图片的方法。
图片旋转的方法如下：
+(UIImage *)rotateAndScaleImage:(UIImage *)image maxResolution:(NSInteger)maxResolution {
int kMaxResolution;
if (maxResolution <= 0)
kMaxResolution = 640;
else
kMaxResolution = (int)maxResolution;
CGImageRef imgRef = image.CGImage;
CGFloat width = CGImageGetWidth(imgRef);
CGFloat height = CGImageGetHeight(imgRef);
CGAffineTransform transform = CGAffineTransformIdentity;
CGRect bounds = CGRectMake(0, 0, width, height);
if (width > kMaxResolution || height > kMaxResolution) {
CGFloat ratio = width/height;
if (ratio > 1) {
bounds.size.width = kMaxResolution;
bounds.size.height = roundf(bounds.size.width / ratio);
}
else {
bounds.size.height = kMaxResolution;
bounds.size.width = roundf(bounds.size.height * ratio);
}
}
CGFloat scaleRatio = bounds.size.width / width;
CGSize imageSize = CGSizeMake(CGImageGetWidth(imgRef), CGImageGetHeight(imgRef));
CGFloat boundHeight;
UIImageOrientation orient = image.imageOrientation;
switch(orient) {
case UIImageOrientationUp: //EXIF = 1
transform = CGAffineTransformIdentity;
break;
case UIImageOrientationUpMirrored: //EXIF = 2
transform = CGAffineTransformMakeTranslation(imageSize.width, 0.0);
transform = CGAffineTransformScale(transform, -1.0, 1.0);
break;
case UIImageOrientationDown: //EXIF = 3
transform = CGAffineTransformMakeTranslation(imageSize.width, imageSize.height);
transform = CGAffineTransformRotate(transform, M_PI);
break;
case UIImageOrientationDownMirrored: //EXIF = 4
transform = CGAffineTransformMakeTranslation(0.0, imageSize.height);
transform = CGAffineTransformScale(transform, 1.0, -1.0);
break;
case UIImageOrientationLeftMirrored: //EXIF = 5
boundHeight = bounds.size.height;
bounds.size.height = bounds.size.width;
bounds.size.width = boundHeight;
transform = CGAffineTransformMakeTranslation(imageSize.height, imageSize.width);
transform = CGAffineTransformScale(transform, -1.0, 1.0);
transform = CGAffineTransformRotate(transform, 3.0 * M_PI / 2.0);
break;
case UIImageOrientationLeft: //EXIF = 6
boundHeight = bounds.size.height;
bounds.size.height = bounds.size.width;
bounds.size.width = boundHeight;
transform = CGAffineTransformMakeTranslation(0.0, imageSize.width);
transform = CGAffineTransformRotate(transform, 3.0 * M_PI / 2.0);
break;
case UIImageOrientationRightMirrored: //EXIF = 7
boundHeight = bounds.size.height;
bounds.size.height = bounds.size.width;
bounds.size.width = boundHeight;
transform = CGAffineTransformMakeScale(-1.0, 1.0);
transform = CGAffineTransformRotate(transform, M_PI / 2.0);
break;
case UIImageOrientationRight: //EXIF = 8
boundHeight = bounds.size.height;
bounds.size.height = bounds.size.width;
bounds.size.width = boundHeight;
transform = CGAffineTransformMakeTranslation(imageSize.height, 0.0);
transform = CGAffineTransformRotate(transform, M_PI / 2.0);
break;
default:
[NSException raise:NSInternalInconsistencyException format:@"Invalid image orientation"];
}
UIGraphicsBeginImageContext(bounds.size);
CGContextRef context = UIGraphicsGetCurrentContext();
if (orient == UIImageOrientationRight || orient == UIImageOrientationLeft) {
CGContextScaleCTM(context, -scaleRatio, scaleRatio);
CGContextTranslateCTM(context, -height, 0);
}
else {
CGContextScaleCTM(context, scaleRatio, -scaleRatio);
CGContextTranslateCTM(context, 0, -height);
}
CGContextConcatCTM(context, transform);
CGContextDrawImage(UIGraphicsGetCurrentContext(), CGRectMake(0, 0, width, height), imgRef);
UIImage *imageCopy = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return imageCopy;
}
因为上传阿里云的时候，上传的图片命名不能相同，所以利用了随机数，和时间戳相结合的命名方法。
随机数方法：
//随机数+ (NSString*)getTransactionID
{
NSDate* date = [NSDate date];
NSMutableString* strDate = [NSMutableString stringWithFormat:@"%@", date];
NSString *s1=[strDate stringByReplacingOccurrencesOfString:@"-" withString:@""];
NSString *s2= [s1 stringByReplacingOccurrencesOfString:@" " withString:@""];
NSString *s3= [s2 stringByReplacingOccurrencesOfString:@":" withString:@""];
int n = (arc4random() % 9000) + 1000;
NSMutableString* transactionID = [NSMutableString stringWithString:[s3 substringToIndex:14]];
[transactionID appendString:[NSString stringWithFormat:@"%d", n]];
[transactionID stringByReplacingOccurrencesOfString:@" " withString:@""];
return transactionID;
}时间戳方法：
//获取当前时间戳
+(NSString *)getNowTimeTimestamp{
NSDate* dat = [NSDate dateWithTimeIntervalSinceNow:0];
NSTimeInterval a=[dat timeIntervalSince1970];
NSString*timeString = [NSString stringWithFormat:@"%0.f", a];//转为字符型
return timeString;
}三.在调用相册的地方引用方法
[AliyunUpload uploadImage:headImageArray FileDirectory:ENT_fileItemImageBody
success:^(NSString *obj) {
_pictureStr =obj ;//就是上传后图片名
dispatch_sync(dispatch_get_main_queue(), ^{
});
}];拿到图片名后需要拼接字符串@“http://yijiao.oss-cn-qingdao.aliyuncs.com/”，即可是网络图片。
自己写了个小demo,需要的可以下载，如有什么疑问，可以评论提出。
注: 本篇独发金蝶云社区。
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