Xcode10 
一，AFNetworking跟SDWebImge是功能强大且常用的第三方，然而在实际应用中需要封装用来复用今天就跟大家分享一下AFN&SDWeb的二次封装
1.
HttpClient.h及.m
.h定义了HTTP常用的四种GET POST PUT DELETE 请求
一般分别用做增删减查
定义前预处理，请求成功处理，请求失败处理的block
及带多参数w的方法声明
.m设置请求类型跟响应类型，监听网络是否有网络，如果没有，弹出网络异常的警示框
2.
UIImageView+WebCache.h及.m
这是类别的方法，把网络请求图片封装起来
.h 定义加载成功，加载失败及加载进度的block
下载未成功时预设图片的加载方法及网络请求下载图片的方法声明
.m
是两个方法的具体实现
1 #import <Foundation/Foundation.h>
2 #import "AFNetworking.h"
3
4 //HTTP请求类别
5 typedef NS_ENUM(NSInteger,HttpRequestType) {
6 HttpRequestGet,
7 HttpRequestPost,
8 HttpRequestPut,
9 HttpRequestDelete,
10 };
11
12
13 /**
14 * 请求前预处理block
15 */
16 typedef void(^PrepareExecuteBlock)(void);
17
18 typedef void(^SuccessBlock)(NSURLSessionDataTask * task, id responseObject);
19
20 typedef void(^FailureBlock)(NSURLSessionDataTask * task, NSError * error);
21
22 @interface HttpClient : NSObject
23
24 + (HttpClient *)defaultClient;
25
26 /**
27 * HTTP请求（GET,POST,PUT,DELETE）
28 *
29 * @param url 请求地址
30 * @param method 请求类型
31 * @param params 请求参数
32 * @param prepare 请求前预处理
33 * @param success 请求成功处理
34 * @param failure 请求失败处理
35 */
36
37 - (void)requestWithPath:(NSString *)url
38 method:(NSInteger)method
39 paramenters:(NSDictionary *)params
40 prepareExecute:(PrepareExecuteBlock)prepare
41 success:(SuccessBlock)success
42 failure:(FailureBlock)failure;
43
44
45 @end
1 #import "HttpClient.h"
2
3 @interface HttpClient ()
4
5 @property (nonatomic, strong) AFHTTPSessionManager * manager;
6
7 @property (nonatomic, assign) BOOL isConnect;
8
9 @end
10
11 @implementation HttpClient
12
13 - (instancetype)init
14 {
15 self = [super init];
16 if (self) {
17
18 self.manager = [AFHTTPSessionManager manager];
19 //设置请求类型
20 self.manager.requestSerializer = [AFHTTPRequestSerializer serializer];
21 //设置响应类型
22 self.manager.responseSerializer = [AFJSONResponseSerializer serializer];
23
24 self.manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json",@"text/html", @"text/json", @"text/javascript",@"text/plain",@"image/gif", nil];
25
26 //开启监听
27 [self openNetMonitoring];
28
29 }
30 return self;
31 }
32
33 - (void)openNetMonitoring {
34
35 [[AFNetworkReachabilityManager sharedManager] setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
36
37 switch (status) {
38 case AFNetworkReachabilityStatusUnknown:
39 self.isConnect = NO;
40 break;
41 case AFNetworkReachabilityStatusNotReachable:
42 self.isConnect = NO;
43 break;
44 case AFNetworkReachabilityStatusReachableViaWiFi:
45 self.isConnect = YES;
46 break;
47 case AFNetworkReachabilityStatusReachableViaWWAN:
48 self.isConnect = YES;
49 break;
50 default:
51 break;
52 }
53
54 }];
55
56 [[AFNetworkReachabilityManager sharedManager] startMonitoring];
57
58 self.isConnect = YES;
59 }
60
61 + (HttpClient *)defaultClient {
62
63 static HttpClient * instance = nil;
64 static dispatch_once_t onceToken;
65 dispatch_once(&onceToken, ^{
66 instance = [[self alloc] init];
67 });
68 return instance;
69 }
70
71 - (void)requestWithPath:(NSString *)url
72 method:(NSInteger)method
73 paramenters:(NSDictionary *)params
74 prepareExecute:(PrepareExecuteBlock)prepare
75 success:(SuccessBlock)success
76 failure:(FailureBlock)failure {
77
78 NSLog(@"请求网络地址为：%@",url);
79
80 if ([self isConnectionAvailable]) {
81
82 //预处理
83 if (prepare) {
84 prepare();
85 }
86
87 switch (method) {
88 case HttpRequestGet:
89 [self.manager GET:url parameters:params progress:nil success:success failure:failure];
90 break;
91 case HttpRequestPost:
92 [self.manager POST:url parameters:params progress:nil success:success failure:failure];
93 break;
94 case HttpRequestPut:
95 [self.manager PUT:url parameters:params success:success failure:failure];
96 break;
97 case HttpRequestDelete:
98 [self.manager DELETE:url parameters:params success:success failure:failure];
99 break;
100 default:
101 break;
102 }
103
104 } else {
105
106 [self showExceptionDialog];
107 }
108 }
109
110 - (BOOL)isConnectionAvailable {
111
112 return self.isConnect;
113 }
114
115 - (void)showExceptionDialog {
116
117 [[[UIAlertView alloc] initWithTitle:@"提示" message:@"网络连接异常，请检查网络连接" delegate:nil cancelButtonTitle:@"好的" otherButtonTitles: nil] show];
118 }
119
120 @end
1 #import <UIKit/UIKit.h> 2 #import "UIImageView+WebCache.h" 3 4 typedef void (^DownloadSuccessBlock) (SDImageCacheType cacheType, UIImage *image); 5 typedef void (^DownloadFailureBlock) (NSError *error); 6 typedef void (^DownloadProgressBlock) (CGFloat progress); 7 8 @interface UIImageView (SDWebImage) 9 10 /** 11 * SDWebImage 下载并缓存图片 12 * 13 * @param url 图片的url 14 * 15 * @param place 还未下载成功时的替换图片 16 * 17 */ 18 - (void)downloadImage:(NSString *)url 19 place:(UIImage *)place; 20 21 /** 22 * SDWebImage 下载并缓存图片和下载进度 23 * 24 * @param url 图片的url 25 * 26 * @param place 还未下载成功时的替换图片 27 * 28 * @param success 图片下载成功 29 * 30 * @param failure 图片下载失败 31 * 32 * @param progress 图片下载进度 33 */ 34 - (void)downloadImage:(NSString *)url 35 place:(UIImage *)place 36 success:(DownloadSuccessBlock)success 37 failure:(DownloadFailureBlock)failure 38 received:(DownloadProgressBlock)progress; 39 40 41 42 @end
1 #import "UIImageView+SDWebImage.h"
2
3 @implementation UIImageView (SDWebImage)
4
5 - (void)downloadImage:(NSString *)url
6 place:(UIImage *)place
7 {
8 [self sd_setImageWithURL:[NSURL URLWithString:url] placeholderImage:place options:SDWebImageLowPriority | SDWebImageRetryFailed];
9 }
10
11
12 - (void)downloadImage:(NSString *)url
13 place:(UIImage *)place
14 success:(DownloadSuccessBlock)success
15 failure:(DownloadFailureBlock)failure
16 received:(DownloadProgressBlock)progress
17 {
18 [self sd_setImageWithURL:[NSURL URLWithString:url] placeholderImage:place options:SDWebImageRetryFailed | SDWebImageLowPriority progress:^(NSInteger receivedSize, NSInteger expectedSize) {
19
20 progress((float)receivedSize/expectedSize);
21
22 } completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL) {
23
24 if (error) {
25 failure(error);
26 }else{
27 // image是下载好的图片
28 self.image = image;
29 success(cacheType, image);
30 }
31 }];
32 }
33
34 @end
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