创建plistiphonesdk

- (void)writeToPlist{
    NSString *filePath = [NSString stringWithFormat:@"%@/course_title", DOCUMENTS_FOLDER];
    NSMutableDictionary* plistDict = [[NSMutableDictionary alloc] initWithContentsOfFile:filePath];

    [plistDict setValue:@"1.1.1" forKey:@"ProductVersion"];
    [plistDict writeToFile:filePath atomically: YES];    
}

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