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我的應用程序出現問題，收集數據時，CPU使用率高達100％以上。我已經盡了我所能想到的處理方式，以便它不鎖定設備，並且仍然繼續獲取所需的數據。iOS CPU使用率在這裏上升
我們的客戶有一些大的數據庫，所以下載整個數據庫是不成問題的。我們也使用REMObjects作爲中間件，所以我必須使用它。我所做的是弄清楚用戶需要什麼數據，並設置一系列調用來收集這些信息。我認爲，我的問題在於數據庫最多隻能處理1500個項目。
這是一個示例查詢字符串，正在發送到服務器。
SELECT COMMUNICATIONID, PHONEEXTENTION, PHONEDESC, PHONETIMETOCALL, PHONENUMBER
FROM PHONE WHERE COMMUNICATIONID IN (3761, 3793, 5530, 4957, 4320, 1914, 3715, 6199, 5548,
5580, 5994, 5867, 1437, 4943, 6217, 3765, 2442, 227, 4084, 977, 6822, 5680, 263, 4502,
327, 6112, 136, 7053, 5571, 6958, 6799, 5525, 6530, 4779, 604, 2182, 6198, 3792, 6071,
4383, 5866, 7444, 1309, 226, 4083, 5916, 1295, 626, 1249, 1950, 2141, 3369, 326, 135,
6780, 5411, 5938, 4424, 6034, 649, 6179, 5861, 4778, 5479, 2181, 6197, 3791, 5815, 6070,
6420, 7935, 4542, 4319, 6679, 4942, 4082, 4974, 5533, 5788, 5597, 976, 3764, 1917, 6202,
134, 6779, 3768, 5410, 5665, 7880, 7052, 6033, 5492, 6815, 3118, 4218, 5110, 6529, 6115,
6069, 348, 4318, 4382, 1498, 6406, 4941, 7443, 2376, 4623, 5755, 5532, 6201, 6392, 625,
7270, 4977, 6396, 6524, 5664, 7051, 725, 6032, 6701, 6160, 5491, 5937, 6273, 1875, 6114,
5477, 6528, 5573, 4936, 6705, 2180, 3758, 5527, 5368, 5814, 7328, 7424, 429, 5991, 1434,
6391, 6200, 7283, 5868, 5900, 228, 4085, 6109, 1106, 5791, 692, 6095, 7210, 2893, 1188,
6814, 4217, 5572, 3757, 5813, 3694, 796, 605, 6486, 128, 4144, 5722, 5754, 1915, 5676,
5549, 5581, 4976, 5917, 5822, 2174, 6158, 1633, 4566, 5267, 4885, 4503, 1874, 6113, 5476,
4425, 4871, 5526, 6531, 7886, 1496, 5194, 127, 4780, 5721)
該字符串是通過以下的方法，其接着發送它異步於服務器創建的。這種方法存在一個問題，我知道這是一個問題，但我沒有時間回過頭來設計一個更好的解決方案。我正在使用respondsToSelector和performSelector來處理基於我們正在收集詳細信息的表的其他方法。
- (void)processRequest
{
if(requestQueue.count == 0)
return;
if(processingQueue.count > 3)
return;
Request *request = requestQueue[0];
[requestQueue removeObjectAtIndex:0];
DADataTable *source = request.source;
NSString *destTableName = request.destTableName;
NSString *sourceKey = request.sourceKey;
NSString *query = request.query;
NSArray *destKeys = request.destKeys;
NSString *originMethodName = request.originMethodName;
NSArray *destinationMethods = request.destinationMethods;
NSString *message = request.loadingMessage;
[[NSNotificationCenter defaultCenter] postNotificationName:@"GATHERINGDATA" object:nil];
// Cycle through the rows in the source table and extract the keys we need.
// originMethodName is needed because some tables require additional checks
// to determine what kind of key we are working with
// sourceKey is the string that holds the key we're looking for, which is
// used on tables that don't need specific filtering
NSSet *set = [self getSourceSet:source originMethodName:originMethodName sourceKey:sourceKey];
// getLists takes the set generated by getSourceSet and converts the list of
// ids into a comma separated list of items suitable for passing into a query
// Currently there is a 1400 item limit per list to keep from exceeding the server
// limit, which is currently 1500
NSArray *lists = [self getLists:set];
NSString *msg = @"Loading Data";
NSLog(@"%@", message);
for(NSString *tList in lists) {
if(tList.length == 0) {
NSLog(@"%@ not needed", originMethodName);
continue;
}
query = [query stringByAppendingFormat:@"%@)", tList];
NSLog(@"%@: %@", destTableName, query);
DAAsyncRequest __block *r = [fda beginGetDataTableWithSQL:query withBlock:^(DADataTable *table){
DADataTable *destination = [tables valueForKey:destTableName];
if(tables.count == 0) destination = table;
else if([destination rowCount] > 0)
//dispatch_async(queue, ^(){
[destination mergeTable:table withPrimaryKeys:destKeys];
//});
else
destination = table;
[[NSUserDefaults standardUserDefaults] setValue:msg forKey:@"LoadingMessage"];
[[NSNotificationCenter defaultCenter] postNotificationName:InitialViewControllerNotificationLoadingUpdate object:nil];
[[NSNotificationCenter defaultCenter] postNotificationName:@"UpdateStatus" object:nil];
//dispatch_async(queue, ^(){
[tables setValue:destination forKey:destTableName];
//});
for(NSString *method in destinationMethods) {
SEL tMethod = NSSelectorFromString(method);
if([self respondsToSelector:tMethod]) {
[self performSelector:tMethod withObject:table];
}
}
if([self busy] &&
[[source name] isEqualToString:DataAccessTableCustomer])
{
[[NSUserDefaults standardUserDefaults] setValue:nil forKey:@"FETCHINGJOB"];
[[NSNotificationCenter defaultCenter] postNotificationName:@"JOBFETCHED" object:nil];
}
if([[[NSUserDefaults standardUserDefaults] valueForKey:@"FETCHINGCONTACT"] isEqualToString:@"YES"] &&
([[source name] isEqualToString:DataAccessTablePerson] ||
[[source name] isEqualToString:DataAccessTableOrganization] ||
[[source name] isEqualToString:DataAccessTableOrganizationAddress]))
{
[[NSUserDefaults standardUserDefaults] setValue:nil forKey:@"FETCHINGCONTACT"];
[[NSNotificationCenter defaultCenter] postNotificationName:@"CONTACTFETCHED" object:nil];
}
[processingQueue removeObject:r];
[[NSNotificationCenter defaultCenter] postNotificationName:@"PROCESSREQUEST" object:nil];
}];
[processingQueue addObject:r];
}
}
在這裏的任何幫助將不勝感激！感謝您花時間看看。
我們需要更多的信息來幫助你。你有沒有使用時間分析器儀器運行你的代碼？這會指向佔用最多CPU時間的代碼。 –