ktyr report

NSDictionaryからjson文字列を生成

NSError*error=nil;
NSData*data=[NSJSONSerialization dataWithJSONObject:dic options:2 error:&error];
NSString*jsonstr=[[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];

NSDateから文字列生成

-(NSString*) getDatetimeFromDate:(NSDate*)date
{
    NSDateFormatter* form = [[NSDateFormatter alloc] init];
    NSCalendar* cal = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar];
    [form setCalendar: cal];
    [form setDateFormat:@"yyyy-MM-dd HH:mm:ss"];
    NSString* str = [form stringFromDate:date];
    return str;
}
NSString*dateString=[self getDatetimeFromDate:[NSDate date]];

カラムの型一覧取得

-(EGODatabase*)getDB
{
    EGODatabase* database = [EGODatabase databaseWithPath:[NSHomeDirectory() stringByAppendingPathComponent:@"Documents/database.db"]];
    return database;
}
-(NSDictionary*)getColumnTypesByTableName:(NSString*)tableName
{
    EGODatabase*db=[self getDB];
    NSString*sql=[NSString stringWithFormat:@"pragma table_info(%@)",tableName];
    EGODatabaseResult*result=[db executeQuery:sql];
    NSMutableDictionary*dic=[NSMutableDictionary dictionary];
    for (EGODatabaseRow*row in result) {
        [dic setObject:[row stringForColumn:@"type"] forKey:[row stringForColumn:@"name"]];
    }
    return dic;
}

カラム名一覧取得

-(NSArray*)getColumnNamesByTableName:(NSString*)tableName{
    EGODatabase*db=[self getDB];
    NSString*sql=[NSString stringWithFormat:@"pragma table_info(%@)",tableName];
    EGODatabaseResult*result=[db executeQuery:sql];
    NSMutableArray*list=[NSMutableArray arrayWithCapacity:[result count]];
    for (EGODatabaseRow*row in result) {
        [list addObject:[row stringForColumn:@"name"]];
    }
    return [NSArray arrayWithArray:list];
}

テーブル一覧取得

-(NSArray*)getTableNameList{
    EGODatabase*db=[self getDB];
    NSString*sql=@"select name from sqlite_master where type = 'table' order by name";
    EGODatabaseResult*result=[db executeQuery:sql];
    NSMutableArray*list=[NSMutableArray arrayWithCapacity:[result count]];
    for (EGODatabaseRow*row in result) {
        [list addObject:[row stringForColumn:@"name"]];
    }
    return [NSArray arrayWithArray:list];
}
-(EGODatabase*)getDB{
    EGODatabase* database = [EGODatabase databaseWithPath:[NSHomeDirectory() stringByAppendingPathComponent:@"Documents/database.db"]];
    return database;
}
-(BOOL)isExistTableByName:(NSString*)tableName{
    NSArray*tables=[self getTableNameList];
    return [tables containsObject:tableName];
}

ファイル存在確認

//Documentsフォルダ内を確認
-(BOOL)isExistFile:(NSString*)fileName{
    NSString* path=[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
    path=[path stringByAppendingPathComponent:fileName];
    return [[NSFileManager defaultManager] fileExistsAtPath:path];
}
//fullパスで確認
-(BOOL)isExistFileByFullPath:(NSString*)path{
    return [[NSFileManager defaultManager] fileExistsAtPath:path];
}

UISliderのつまみをアニメーションさせる

[UIView animateWithDuration:0.3f
        animations:^{
            [slider setValue:2.0 animated:YES];
        }
];

UIButtonのラベルをフォントサイズ自動縮小にする

UILabel*innerLabel= btn.titleLabel;
innerLabel.adjustsFontSizeToFitWidth=YES;
innerLabel.lineBreakMode=NSLineBreakByClipping;//これがないとフォントが自動縮小しない
innerLabel.numberOfLines=3;

UIButtonのタイトルの位置,サイズ調整

UIButton*btn=[UIButton buttonWithType:UIButtonTypeCustom];
[btn setTitleEdgeInsets:UIEdgeInsetsMake(6.0f, 7.0f, 8.0f, 9.0f];//top margin:6.0, left margin:7.0, bottom margin:8.0, right margin:9.0

バンドルしたテキストファイルを読み込む

NSString *path = [[NSBundle mainBundle] pathForResource:@"testdata" ofType:@"json"];
NSError* error;
NSString* dataString = [NSString stringWithContentsOfFile:path encoding:NSUTF8StringEncoding error:&error];