SQLite MYSQL character encoding

问题

I have a strange situation where the following code works however XCode warns it is deprecated...

NSString *col1 = [NSString stringWithCString:(char *)sqlite3_column_text(compiledStatement, 0)];

However as that is the deprecated method if I set an encoding the string comes out wrong! I have tried all the encodings but none work!

NSString *col1 = [NSString stringWithCString:(char *)sqlite3_column_text(compiledStatement, 0) encoding:NSASCIIStringEncoding];

回答1:

I would have expected satire's suggestion to have worked, however here is the Cocoa version of what I use:

If you are dealing with utf16

int len = sqlite3_column_bytes16(compiledStatement, col) / 2;
unichar *chars = (unichar*)sqlite3_column_text16(compiledStatement, col);
NSString *str = [NSString stringWithCharacters:chars length:len];

If you are using utf8

int len = sqlite3_column_bytes(compiledStatement, col);
char *chars = (char*)sqlite3_column_text(compiledStatement, col);
NSString *str = [NSString stringWithUTF8String:chars length:len];

回答2:

try NSString *col1 = [NSString stringWithUTF8String:(char *)sqlite3_column_text(compiledStatement, 0)];

if your database coded with utf8

回答3:

First check that entry in the database contaoins Same Roman Words or not .

NSString *strtemp = [NSString stringWithCString:(char *)sqlite3_column_text(compiledStatement, 0)]; strtemp=[strtemp stringByAddingPercentEscapesUsingEncoding:NSMacOSRomanStringEncoding];

NSMacOSRomanStringEncoding will definately work.I have face same issue.

回答4:

Try this it works for me for UTF8 encoding

char *chars = (char*)sqlite3_column_text(compiledStatement, col);
NSString *str = [NSString stringWithCString:chars encoding:NSUTF8StringEncoding];

来源：https://stackoverflow.com/questions/5258007/sqlite-mysql-character-encoding