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我目前正在通過一些內存泄漏進行對抗,並且遇到了一些嚴重的問題,並且還沒有解決我離開的最後一個問題。泄漏儀器出於各種不同原因顯示幾個泄漏都來自相同的方法,主要歸因於NSCFString,NSMutableArray和我稱爲GraphData的類。我試圖用幾種不同的方法解決這個問題,所以希望能夠解決這個問題,希望這個問題很簡單,我忽略了。內存泄露sqlite iOS應用程序
下面是一些代碼:
// the offending, leaking method
-(NSMutableArray*)fillDataInArray:(NSInteger)keyphrase_id{
NSLog(@"Keyphrase_id:%d", keyphrase_id);
NSDate *startdate = [self getDateForApplicationInstalled];
NSDate *enddate = [NSDate date];
NSString *dateString1=[[NSString alloc] initWithString: [fmt stringFromDate:startdate]];
NSString *dateString2=[[NSString alloc] initWithString: [fmt stringFromDate:enddate]];
NSMutableArray *newDataNew = [[NSMutableArray alloc]init];
self.newData = newDataNew;
[newDataNew release];
selStmt = nil;
if (!selStmt)
{
const char *sql = "select distinct position, key_time from ranking where keyphrase_id = ? and key_time between ? and ? order by key_time";
if (sqlite3_prepare_v2(database, sql, -1, &selStmt, NULL) != SQLITE_OK)
{
selStmt = nil;
}
NSInteger n = keyphrase_id;
sqlite3_bind_int(selStmt, 1, n);
sqlite3_bind_text(selStmt, 2, [dateString1 UTF8String] , -1, SQLITE_TRANSIENT);
sqlite3_bind_text(selStmt, 3, [dateString2 UTF8String] , -1, SQLITE_TRANSIENT);
NSLog(@"SQL query is: [%s]", sql);
}
if (!selStmt)
{
NSAssert1(0, @"Can't build SQL to read keyphrases [%s]", sqlite3_errmsg(database));
}
int ret;
while ((ret=sqlite3_step(selStmt))==SQLITE_ROW)
{
GraphData *item = [[GraphData alloc]init];
item.key = sqlite3_column_int(selStmt, 0);
item.value = [NSString stringWithUTF8String:(char *)sqlite3_column_text(selStmt,1)];
[newData addObject:item];
[item release], item = nil;
}
sqlite3_reset(selStmt); // reset (unbind) statement
[dateString2 release];
[dateString1 release];
return newData;
}
//GraphData.h
@interface GraphData : NSObject{
NSInteger key;
NSString *value;
}
@property (nonatomic, readwrite) NSInteger key;
@property (nonatomic, retain) NSString *value;
-(id)initWithPrimaryKey:(NSInteger) xid;
-(id)initWithName:(NSString *)n key:(NSInteger)i;
@end
//GraphData.m
#import "GraphData.h"
@implementation GraphData
@synthesize key,value;
-(id)initWithPrimaryKey:(NSInteger) xid{
self.key = xid;
self.value = @"";
return self;
}
-(id)initWithName:(NSString *)n key:(NSInteger)i{
self.key = 0;
self.value = n;
return self;
}
-(void)dealloc{
[value release], value = nil;
[super dealloc];
}
@end
感謝您看我的帖子!
該方法的調用者似乎保留了他們的方法調用的返回值,所以希望你已經用該答案擊中了頭部的指甲!不過,我現在要回家以後要明天檢查一下。雖然謝謝! – Jace