iOS AutoLayoutについて(Storyboard・Code)

AutolayoutとはviewにConstraint（制約）を付けることでレイアウトする方法。

下記の図に簡単にまとめってみました。

Sample Code:
Fix size to 100X100 and distance 30X30;

    [self addSubview:self.testview];
    NSArray *c_v = [NSLayoutConstraint constraintsWithVisualFormat:@"V:[testview(==100)]"
                                                           options:0
                                                           metrics:nil
                                                             views:@{@"testview":self.testview}];

    NSArray *c_h = [NSLayoutConstraint constraintsWithVisualFormat:@"H:[testview(==100)]"
                                                           options:0
                                                           metrics:nil
                                                             views:@{@"testview":self.testview}];

    [self addConstraints:c_h];
    [self addConstraints:c_v];

    NSArray *l_v = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-hdistance-[testview]"
                                                           options:0
                                                           metrics:@{@"hdistance":@(30)}
                                                             views:@{@"testview":self.testview}];

    NSArray *l_h = [NSLayoutConstraint constraintsWithVisualFormat:@"H:[testview]-vdistance-|"
                                                           options:0
                                                           metrics:@{@"vdistance":@(30)}
                                                             views:@{@"testview":self.testview}];

    [self addConstraints:l_v];
    [self addConstraints:l_h];

参考資料：
http://dev.classmethod.jp/references/ios-7-xcode-5-auto-layout-2/