NSURLConnection 发送同步请求的方法在iOS9.0已经被废弃
+ (nullable NSData *)sendSynchronousRequest:(NSURLRequest *)request returningResponse:(NSURLResponse * __nullable * __nullable)response error:(NSError **)error NS_DEPRECATED(10_3, 10_11, 2_0, 9_0, "Use [NSURLSession dataTaskWithRequest:completionHandler:] (see NSURLSession.h") __WATCHOS_PROHIBITED;
用来替代的NSURLSession 只有带block的方法可以调用，没有成为同步方法，我们稍微改一下，让它支持同步的请求
- (NSData *)sendSynchronousRequest:(NSURLRequest *)request returningResponse:(NSURLResponse **)response error:(NSError **)error
{
NSError __block *err = NULL;
NSData __block *data;
BOOL __block reqProcessed = false;
NSURLResponse __block *resp;
[[[NSURLSession sharedSession] dataTaskWithRequest:request completionHandler:^(NSData * _Nullable _data, NSURLResponse * _Nullable _response, NSError * _Nullable _error) {
resp = _response;
err = _error;
data = _data;
reqProcessed = true;
}] resume];
while (!reqProcessed) {
[NSThread sleepForTimeInterval:0];
}
*response = resp;
*error = err;
return data;
}
请求的时候调用
/NSData *data = [NSURLConnection sendSynchronousRequest:theRequest returningResponse:&resp error:&err];
NSData *data = [self sendSynchronousRequest:theRequest returningResponse:&resp error:&err];
