拼音 名字 排序 a-z的比较 （ sortUsingComparator ）

NSMutableArray * array = [NSMutableArrayarrayWithObjects:@"ad",@"az",@"ac",@"ab",@"aa", nil];

DLog("ar :: %@",array);

[array sortUsingComparator:^NSComparisonResult(id obj1, id obj2) {

return [obj1 localizedStandardCompare:obj2];

}];

DLog("ar :: %@",array);

画线1：

//Define line width and cap

CGContextSetLineWidth(ctx, TB_BACKGROUND_WIDTH);

CGContextSetLineCap(ctx, kCGLineCapButt);

CGPoint p1 = CGPointMake(10, 10);

CGPoint p2 = CGPointMake(40, 10);

CGPoint p3 = CGPointMake(40, 30);

CGPoint p4 = CGPointMake(10, 30);

CGPoint points[4] = {p1,p2,p3,p4};

CGContextAddLines(ctx, points, 3);

画线2：

CGContextAddLineToPoint

比较：http://blog.sina.com.cn/s/blog_67a5e4720100yeky.html