由于项目中多处需要上传图片，我们可以自定义上传图片请求，自定义调取相册及拍照，方便多处使用时调用。
主要步骤：
1.第一步：请求上传你选取的相册图片或者拍照图片（经过压缩处理）
2.第二步：获取到第一步图片url上传给服务器
3.第三步：回显图片（当然进入该界面时先判断是否有图片，无图则展示占位图片，否则就回显图片）
废话不多说，直接上代码：
1）封装的上传图片的网络请求(图片压缩) QTXUploadImage 文件
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// 利用 afn 上传一张图片
#import <Foundation/Foundation.h>
@interface QTXUploadImage : NSObject
// 上传图片的网络请求(图片压缩)
+ (void)post:(NSString *)url image:(UIImage *)image name:(NSString *)name success:(void (^)(id json))success failure:(void (^)(NSError *error))failure;
@end
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#import "QTXUploadImage.h"
#import "AFNetworking.h"
#import "QTXAccount.h"
#import "QTXAccountTool.h"
@implementation QTXUploadImage
/**
* 上传图片的网络请求(图片压缩)
*
* @param url 上传图片的网络请求地址
* @param name 和后台包名一致
*
*/
+ (void)post:(NSString *)url image:(UIImage *)image name:(NSString *)name success:(void (^)(id json))success failure:(void (^)(NSError *error))failure {
// 1.创建网络管理者
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
// 2.拼接请求参数url 也可在具体控制器请求里传入
NSDictionary *dict = @{@"userId" : [QTXAccountTool account].userId};
// 3.发送请求
[manager POST:url parameters:dict constructingBodyWithBlock:
^void(id<AFMultipartFormData> formData) {
NSData *imageData = UIImageJPEGRepresentation(image, 0.5);//进行图片压缩
// 使用日期生成图片名称
NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
formatter.dateFormat = @"yyyyMMddHHmmss";
NSString *fileName = [NSString stringWithFormat:@"%@.png",[formatter stringFromDate:[NSDate date]]];
// 任意的二进制数据MIMEType application/octet-stream
[formData appendPartWithFileData:imageData name:name fileName:fileName mimeType:@"image/png"];
} success:^void(NSURLSessionDataTask * task, id responseObject) {
if (success) {
success(responseObject);
}
} failure:^void(NSURLSessionDataTask * task, NSError * error) {
if (failure) {
failure(error);
}
}];
}
@end
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2）封装的拍照/从相册选择 QTXImagePicker 文件
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// 拍照/从相册选择
#import <Foundation/Foundation.h>
typedef void(^QTXImagePickerFinishAction)(UIImage *image);
@interface QTXImagePicker : NSObject
/**
@param viewController 用于present UIImagePickerController对象
@param allowsEditing 是否允许用户编辑图像
*/
+ (void)showImagePickerFromViewController:(UIViewController *)viewController
allowsEditing:(BOOL)allowsEditing
finishAction:(QTXImagePickerFinishAction)finishAction;
@end
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#import "QTXImagePicker.h"
@interface QTXImagePicker()<UIActionSheetDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate>
@property (nonatomic, weak) UIViewController *viewController;
@property (nonatomic, copy) QTXImagePickerFinishAction finishAction;
@property (nonatomic, assign) BOOL allowsEditing;
@end
static QTXImagePicker *qtxImagePickerInstance = nil;
@implementation QTXImagePicker
+ (void)showImagePickerFromViewController:(UIViewController *)viewController allowsEditing:(BOOL)allowsEditing finishAction:(QTXImagePickerFinishAction)finishAction {
if (qtxImagePickerInstance == nil) {
qtxImagePickerInstance = [[QTXImagePicker alloc] init];
}
[qtxImagePickerInstance showImagePickerFromViewController:viewController
allowsEditing:allowsEditing
finishAction:finishAction];
}
- (void)showImagePickerFromViewController:(UIViewController *)viewController
allowsEditing:(BOOL)allowsEditing
finishAction:(QTXImagePickerFinishAction)finishAction {
_viewController = viewController;
_finishAction = finishAction;
_allowsEditing = allowsEditing;
UIActionSheet *sheet = nil;
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
sheet = [[UIActionSheet alloc] initWithTitle:nil
delegate:self
cancelButtonTitle:@"取消"
destructiveButtonTitle:nil
otherButtonTitles:@"拍照", @"从相册选择", nil];
}else {
sheet = [[UIActionSheet alloc] initWithTitle:nil
delegate:self
cancelButtonTitle:@"取消"
destructiveButtonTitle:nil
otherButtonTitles:@"从相册选择", nil];
}
UIView *window = [UIApplication sharedApplication].keyWindow;
[sheet showInView:window];
}
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
NSString *title = [actionSheet buttonTitleAtIndex:buttonIndex];
if ([title isEqualToString:@"拍照"]) {
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
picker.delegate = self;
picker.sourceType = UIImagePickerControllerSourceTypeCamera;
picker.allowsEditing = _allowsEditing;
[_viewController presentViewController:picker animated:YES completion:nil];
}else if ([title isEqualToString:@"从相册选择"]) {
UIImagePickerController *picker = [[UIImagePickerController alloc] init];
// [picker.navigationBar setBarTintColor:QTXNavColor]; // 修改相册的导航条的背景颜色
picker.delegate = self;
picker.allowsEditing = YES;
picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
[_viewController presentViewController:picker animated:YES completion:nil];
}else {
qtxImagePickerInstance = nil;
}
}
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
UIImage *image = info[UIImagePickerControllerEditedImage];
if (image == nil) {
image = info[UIImagePickerControllerOriginalImage];
}
if (_finishAction) {
_finishAction(image);
}
[picker dismissViewControllerAnimated:YES completion:^{}];
qtxImagePickerInstance = nil;
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
if (_finishAction) {
_finishAction(nil);
}
[picker dismissViewControllerAnimated:YES completion:^{}];
qtxImagePickerInstance = nil;
}
@end
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当使用时，在所需使用的控制器里调用：
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[QTXImagePicker showImagePickerFromViewController:self allowsEditing:YES finishAction:^(UIImage *image) {
if (image) {
self.idSideImage = image;
[QTXUploadImage post:QTX_xsz1Url image:image name:@"xsz1" success:^(id json) {
// 第一步请求上传
QTXLog(@"图像上传请求成功 %@", json);
self.idSide = json[@"data"];
} failure:^(NSError *error) {
QTXLog(@"学生证图像上传请求失败 %@", error);
}];
}
}];
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第二步和第三步 需要和各位自己后台server联调，就属于普通的get/post请求了，这边就不放代码了哟
插一下，我们产品没让拍照的照片存储到相册
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// 存储图片名称：001.png ~ 009.png
for (int i = 1; i<=9; i++) {
UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"00%d.png", i]];
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
[NSThread sleepForTimeInterval:1];
}
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以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：http://www.jianshu.com/p/990d3e60c1e9?utm_source=tuicool&utm_medium=referral