在iOS中系统默认不能直接修改结构体成员属性的值, 通过添加分类来实现这个功能.
- 头文件(.h)
#import
@interface UIView (Extension)
@property (nonatomic, assign) CGFloat x;
@property (nonatomic, assign) CGFloat y;
@property (nonatomic, assign) CGFloat centerX;
@property (nonatomic, assign) CGFloat centerY;
@property (nonatomic, assign) CGFloat width;
@property (nonatomic, assign) CGFloat height;
@property (nonatomic, assign) CGSize size;
@property (nonatomic, assign) CGPoint origin;
@end
- 实现文件(.m)
#import "UIView+Extension.h"
@implementation UIView (Extension)
- (void)setX:(CGFloat)x
{
CGRect frame = self.frame;
frame.origin.x = x;
self.frame = frame;
}
- (void)setY:(CGFloat)y
{
CGRect frame = self.frame;
frame.origin.y = y;
self.frame = frame;
}
- (CGFloat)x
{
return self.frame.origin.x;
}
- (CGFloat)y
{
return self.frame.origin.y;
}
- (void)setCenterX:(CGFloat)centerX
{
CGPoint center = self.center;
center.x = centerX;
self.center = center;
}
- (void)setCenterY:(CGFloat)centerY
{
CGPoint center = self.center;
center.y = centerY;
self.center = center;
}
- (CGFloat)centerX
{
return self.center.x;
}
- (CGFloat)centerY
{
return self.center.y;
}
- (void)setWidth:(CGFloat)width
{
CGRect frame = self.frame;
frame.size.width = width;
self.frame = frame;
}
- (void)setHeight:(CGFloat)height
{
CGRect frame = self.frame;
frame.size.height = height;
self.frame = frame;
}
- (CGFloat)height
{
return self.frame.size.height;
}
- (CGFloat)width
{
return self.frame.size.width;
}
- (void)setSize:(CGSize)size
{
CGRect frame = self.frame;
frame.size = size;
self.frame = frame;
}
- (CGSize)size
{
return self.frame.size;
}
- (void)setOrigin:(CGPoint)origin
{
CGRect frame = self.frame;
frame.origin = origin;
self.frame = frame;
}
- (CGPoint)origin
{
return self.frame.origin;
}
@end
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