UIView.frame 用の便利カテゴリ

概要

例えば frame 幅を10にしたいとき、

CGRect rect = view.frame;
rect.size.width = 10;
view.frame = rect;

という毎回のお約束がたるいので、それを1行で書けるようにするカテゴリを作りました。
bounds はあまりいじらないと思うので対応しません。

使い方

次のような感じに書けるようになります。

view.x = 10;
[view setX:10];
view.y = 20;
[view setY:10];

view.width = 100;
view.height = 200;

view.size = CGSizeZero;
[view setSize:CGSizeZero];

view.xRelative = -4;
view.heightRelative = 50;

UIViewAnimation Block 内でも使えます。

UIView+ViewFrame

setter と getter がプロパティに対応するように実装するだけです。
具体的には -setHoge: -hoge の対です。

.h

@interface UIView (ViewFrame)

// frame.origin を取得
- (CGPoint)origin;
- (CGFloat)x;
- (CGFloat)y;

// frame.size を取得
- (CGSize)size;
- (CGFloat)width;
- (CGFloat)height;

// frame.origin を設定
- (void)setOrigin:(CGPoint)p;
- (void)setX:(CGFloat)x;
- (void)setY:(CGFloat)y;

// frame.size を設定
- (void)setSize:(CGSize)s;
- (void)setWidth:(CGFloat)w;
- (void)setHeight:(CGFloat)h;

// frame.origin を相対的に設定
- (void)setOriginRelative:(CGPoint)p;
- (void)setXRelative:(CGFloat)x;
- (void)setYRelative:(CGFloat)y;

// frame.size を相対的に設定
- (void)setSizeRelative:(CGSize)s;
- (void)setWidthRelative:(CGFloat)w;
- (void)setHeightRelative:(CGFloat)h;

@end

.m

@implementation UIView (ViewFrame)

- (CGPoint)origin
{
    return self.frame.origin;
}
- (CGFloat)x
{
    return self.origin.x;
}
- (CGFloat)y
{
    return self.origin.y;
}

- (CGSize)size
{
    return self.frame.size;
}
- (CGFloat)width
{
    return self.size.width;
}
- (CGFloat)height
{
    return self.size.height;
}

// frame.origin を設定
- (void)setOrigin:(CGPoint)p
{
    CGRect r = self.frame;
    r.origin = p;
    self.frame = r;
}
- (void)setX:(CGFloat)x
{
    CGRect r = self.frame;
    r.origin.x = x;
    self.frame = r;
}
- (void)setY:(CGFloat)y
{
    CGRect r = self.frame;
    r.origin.y = y;
    self.frame = r;
}

// frame.size を設定
- (void)setSize:(CGSize)s
{
    CGRect r = self.frame;
    r.size = s;
    self.frame = r;
}
- (void)setWidth:(CGFloat)w
{
    CGRect r = self.frame;
    r.size.width = w;
    self.frame = r;
}
- (void)setHeight:(CGFloat)h
{
    CGRect r = self.frame;
    r.size.height = h;
    self.frame = r;
}

// frame.origin を相対的に設定
- (void)setOriginRelative:(CGPoint)p
{
    CGRect r = self.frame;
    CGPoint point = r.origin;
    point.x += p.x;
    point.y += p.y;
    r.origin = point;
    self.frame = r;
}
- (void)setXRelative:(CGFloat)x
{
    CGRect r = self.frame;
    CGPoint point = r.origin;
    point.x += x;
    r.origin = point;
    self.frame = r;
}
- (void)setYRelative:(CGFloat)y
{
    CGRect r = self.frame;
    CGPoint point = r.origin;
    point.y += y;
    r.origin = point;
    self.frame = r;
}

// frame.size を相対的に設定
- (void)setSizeRelative:(CGSize)s
{
    CGRect r = self.frame;
    r.size.width += s.width;
    r.size.height += s.height;
    self.frame = r;
}
- (void)setWidthRelative:(CGFloat)w
{
    CGRect r = self.frame;
    r.size.width += w;
    self.frame = r;
}
- (void)setHeightRelative:(CGFloat)h
{
    CGRect r = self.frame;
    r.size.height += h;
    self.frame = r;
}

@end