通过.符号修改View的frame

直接上代码。

@interface UIView (frame)

@property (nonatomic, assign) CGFloat x;
@property (nonatomic, assign) CGFloat y;
@property (nonatomic, assign) CGFloat bottomY;
@property (nonatomic, assign) CGFloat width;
@property (nonatomic, assign) CGFloat height;

@end

@implementation UIView (frame)

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

- (void)setX:(CGFloat)x {
  CGRect frame = self.frame;
  frame.origin.x = x;
  self.frame = frame;
}

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

- (void)setY:(CGFloat)y {
  CGRect frame = self.frame;
  frame.origin.y = y;
  self.frame = frame;
}

- (void)setBottomY:(CGFloat)bottomY {
  CGRect frame = self.frame;
  frame.origin.y = bottomY - self.frame.size.height;
  self.frame = frame;
}

- (CGFloat)bottomY {
  return self.frame.origin.y + self.frame.size.height;
}

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

- (void)setWidth:(CGFloat)width {
  CGRect frame = self.frame;
  frame.size.width = width;
  self.frame = frame;
}

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

- (void)setHeight:(CGFloat)height {
  CGRect frame = self.frame;
  frame.size.height = height;
  self.frame = frame;
}

@end