多线程
- NSThread
- 最常用的用法为
[NSThread currentThread];
查看当前线程
- GCD
- 队列
- 并发队列
- 全局队列
dispatch_get_global_queue
- 自己创建
- 串行队列
- 自己创建
- 主队列
dispatch_get_main_queue
- 任务:block
- 函数
- 单例模式
- 重写allocWithZone(由于alloc会调用allocWithZone)
- 重写copyWithZone(调用allocWithZone方法即可)
- 提供shaer开头的类方法。
- NSOperation
- RunLoop
- 同一时间只能选择一个模式运行
- 自己开辟的子线程需要手动启用runloop
- 模式下有source(事件源), NSTimer(定时器),observe(观察者)
- 自己开辟的子线程必须添加事件源,或者定时器,启动runloop才不会停止。
- 常用模式
- Default:默认
- Tracking:拖拽UIScrollView
网络
HTTP请求
// URL
NSString *urlStr = @"http://xxxxx.com";
urlStr = [urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURL *url = [NSURL URLWithString:urlStr];
// 请求
NSURLRequest *request = [NSURLRequest requestWithURL:url];
// URL
NSString *urlStr = @"http://xxxxx.com";
urlStr = [urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURL *url = [NSURL URLWithString:urlStr];
// 请求
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];
request.HTTPMethod = @"POST";
request.HTTPBody = [@"username=123&pwd=123" dataUsingEncoding:NSUTF8StringEncoding];
数据解析
- JSON
- XML
- SAX: NSXMLParser
- DOM: GDataXML
NSURLConnection(iOS9已经过期)
NSURLSession
NSURLSessionDataTask *task = [[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
}];
[task resume];
NSURLSessionDownloadTask *task = [[NSURLSession sharedSession] downloadTaskWithRequest:request completionHandler:^(NSURL *location, NSURLResponse *response, NSError *error) {
}];
[task resume];
// 创建session
NSURLSession *session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration] delegate:self delegateQueue:[[NSOperationQueue alloc] init]];
// 设置请求头(告诉服务器第1024个字节开始下载)
[request setValue:@"bytes=1024-" forHTTPHeaderField:@"Range"];
// 创建任务
NSURLSessionDataTask *task = [session dataTaskWithRequest:request];
// 开始任务
[task resume];
- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveResponse:(NSURLResponse *)response completionHandler:(void (^)(NSURLSessionResponseDisposition))completionHandler
{
// 打开NSOutputStream
// 获得文件的总长度
// 存储文件的总长度
// 回调
completionHandler(NSURLSessionResponseAllow);
}
- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data
{
// 利用NSOutputStream写入数据
// 计算下载进度
}
- (void)URLSession:(NSURLSession *)session task:(NSURLSessionTask *)task didCompleteWithError:(NSError *)error
{
// 关闭并且清空NSOutputStream
// 清空任务task
}
- 文件上传
- 设置请求头
- 拼接请求体
- NSURLSessionUploadTask
NSURLSessionUploadTask *task = [[NSURLSession sharedSession] uploadTaskWithRequest:request fromData:body completionHandler:^(NSData *data, NSURLResponse *response, NSError *error) {
}];
[task resume];
AFN
// AFHTTPSessionManager内部包装了NSURLSession
AFHTTPSessionManager *mgr = [AFHTTPSessionManager manager];
NSDictionary *params = @{
@"username" : @"520it",
@"pwd" : @"520it"
};
[mgr GET:@"http://120.25.226.186:32812/login" parameters:params success:^(NSURLSessionDataTask *task, id responseObject) {
NSLog(@"请求成功---%@", responseObject);
} failure:^(NSURLSessionDataTask *task, NSError *error) {
NSLog(@"请求失败---%@", error);
}];
// AFHTTPSessionManager内部包装了NSURLSession
AFHTTPSessionManager *mgr = [AFHTTPSessionManager manager];
NSDictionary *params = @{
@"username" : @"520it",
@"pwd" : @"520it"
};
[mgr POST:@"http://120.25.226.186:32812/login" parameters:params success:^(NSURLSessionDataTask *task, id responseObject) {
NSLog(@"请求成功---%@", responseObject);
} failure:^(NSURLSessionDataTask *task, NSError *error) {
NSLog(@"请求失败---%@", error);
}];
AFHTTPSessionManager *mgr = [AFHTTPSessionManager manager];
[mgr POST:@"http://120.25.226.186:32812/upload" parameters:@{@"username" : @"123"}
constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
// 在这个block中设置需要上传的文件
// NSData *data = [NSData dataWithContentsOfFile:@"/Users/xiaomage/Desktop/placeholder.png"];
// [formData appendPartWithFileData:data name:@"file" fileName:@"test.png" mimeType:@"image/png"];
// [formData appendPartWithFileURL:[NSURL fileURLWithPath:@"/Users/xiaomage/Desktop/placeholder.png"] name:@"file" fileName:@"xxx.png" mimeType:@"image/png" error:nil];
[formData appendPartWithFileURL:[NSURL fileURLWithPath:@"/Users/xiaomage/Desktop/placeholder.png"] name:@"file" error:nil];
} success:^(NSURLSessionDataTask *task, id responseObject) {
NSLog(@"-------%@", responseObject);
} failure:^(NSURLSessionDataTask *task, NSError *error) {
}];
UIWebView
- 加载请求
- JS和OC的互相调用
- 利用NSInvocation实现performSelector无限参数
- 异常捕捉