26>ASI使用总结

一、发送请求的2个对象1.发送GET请求：ASIHttpRequest2.发送POST请求：ASIFormDataRequest* 设置参数// 同一个key只对应1个参数值，适用于普通“单值参数”- (void)setPostValue:(id <NSObject>)value forKey:(NSString *)key// 同一个key（同一个参数名），会对应多个参数值，适用于“多值参数”- (void)addPostValue:(id <NSObject>)value forKey:(NSString *)key二、发送请求1.同步请求* startSynchronous2.异步请求* startAsynchronous三、监听请求的过程1.如何监听请求过程1> 为代理，遵守ASIHTTPRequestDelegate协议，实现协议中的代理方法request.delegate = self;- (void)requestStarted:(ASIHTTPRequest *)request;- (void)request:(ASIHTTPRequest *)request didReceiveResponseHeaders:(NSDictionary *)responseHeaders;- (void)request:(ASIHTTPRequest *)request didReceiveData:(NSData *)data;- (void)requestFinished:(ASIHTTPRequest *)request;- (void)requestFailed:(ASIHTTPRequest *)request;2> 成为代理，不遵守ASIHTTPRequestDelegate协议，自定义代理方法request.delegate = self;[request setDidStartSelector:@selector(start:)];[request setDidFinishSelector:@selector(finish:)];3> 设置block[request setStartedBlock:^{    NSLog(@"setStartedBlock");}];[request setHeadersReceivedBlock:^(NSDictionary *responseHeaders) {    NSLog(@"setHeadersReceivedBlock--%@", responseHeaders);}];[request setDataReceivedBlock:^(NSData *data) {    NSLog(@"setDataReceivedBlock--%@", data);}];[request setCompletionBlock:^{    NSLog(@"setCompletionBlock");}];[request setFailedBlock:^{    NSLog(@"setFailedBlock");}];2.监听的使用注意* 如果同时设置了block和实现了代理方法，请求过程中，block和代理方法都会调用* 一般的调用顺序：代理方法 > block3.如果实现了下面的代理方法，那么responseData\responseString就没有值- (void)request:(ASIHTTPRequest *)request didReceiveData:(NSData *)data;四、文件下载1.一般的下载1> 设置文件下载的保存路径request.downloadDestinationPath = filepath;2> 设置进度监听的代理(要想成为进度监听代理，最好遵守ASIProgressDelegate协议)request.downloadProgressDelegate = self.progressView;2.断点下载（断点续传）1> 设置文件下载的临时路径request.temporaryFileDownloadPath = tempFilepath;2> 设置支持断点续传request.allowResumeForFileDownloads = YES;五、文件上传（设置文件参数）1.如果知道文件路径，最好就用这个方法（因为简单）// ASI内部会自动识别文件的MIMEType[request setFile:file forKey:@"file"];[request addFile:file forKey:@"file"];[request setFile:file withFileName:@"basic.pptx" andContentType:@"application/vnd.openxmlformats-officedocument.presentationml.presentation" forKey:@"file"];// .....2.如果文件数据是动态产生的，就用这个方法(比如刚拍照完获得的图片数据)[request setData:data withFileName:@"test.png" andContentType:@"image/png" forKey:@"file"];六、ASIHttpRequest的常见用法1.请求超时@property (atomic, assign) NSTimeInterval timeOutSeconds;2.获得错误信息@property (atomic, retain) NSError *error;3.获得响应数据// 状态码@property (atomic, assign,readonly) int responseStatusCode;// 状态信息@property (atomic, retain,readonly) NSString *responseStatusMessage;// 服务器返回的具体数据（NSString格式）- (NSString *)responseString;// 服务器返回的具体数据（NSData格式）- (NSData *)responseData;