从 sqlite 数据库加载数据错误。 “符号不同”
我在将 SQLite 数据库中的数据加载到详细视图中时遇到问题。该表显示正确，加载详细视图时应用程序崩溃并返回以下警告；
传递“stringWithUTF8String:”参数 1 时的指针目标符号不同，
这是什么意思以及如何解决此问题。请帮忙。这是我的代码。
if (SQLITE_DONE != sqlite3_step(detailStmt)) {
const unsigned char *db_text = sqlite3_column_text(detailStmt, 2);
NSString *address = [NSString stringWithUTF8String: db_text]; //error here!
self.ClubAddress = address;
}
else
NSAssert1(0, @"Error while getting the address of club. '%s'", sqlite3_errmsg(database));
sqlite3_reset(detailStmt);
isDetailViewHydrated = YES;
}
I'm having trouble loading data from sqlite database into a detailed view. The table displays correctly and when loading detailed view the app crashes and returns the following warning;
pointer targets in passing argument 1 of 'stringWithUTF8String:' differ in signedness
What does this mean and how do i fix this. Help please. Here is my code.
if (SQLITE_DONE != sqlite3_step(detailStmt)) {
const unsigned char *db_text = sqlite3_column_text(detailStmt, 2);
NSString *address = [NSString stringWithUTF8String: db_text]; //error here!
self.ClubAddress = address;
}
else
NSAssert1(0, @"Error while getting the address of club. '%s'", sqlite3_errmsg(database));
sqlite3_reset(detailStmt);
isDetailViewHydrated = YES;
}
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当
stringWithUTF8String:需要char *时，您正在传递一个unsigned char *——可能需要在第 2 行删除 unsigned 修饰符片段。You are passing in an
unsigned char *whenstringWithUTF8String:expects achar *-- may want to drop the unsigned modifier on line 2 of your snippet.