比例约束
@interface NSLayoutConstraint (IBDesignable)
@property (nonatomic)IBInspectable BOOL widthScreen;
@end
#define C_WIDTH(WIDTH) WIDTH * [UIScreen mainScreen].bounds.size.width/375.0
#import "NSLayoutConstraint+IBDesignable.h"
@implementation NSLayoutConstraint (IBDesignable)
-(void)setWidthScreen:(BOOL)widthScreen{
if (widthScreen) {
self.constant = C_WIDTH(self.constant);
}else{
self.constant = self.constant;
}
}
-(BOOL)widthScreen{
return self.widthScreen;
}
@end
字体比例约束
@interface UILabel (FixScreenFont)
@property (nonatomic)IBInspectable float fixWidthScreenFont;
@end
#define C_WIDTH(WIDTH) WIDTH * [UIScreen mainScreen].bounds.size.width/375.0
@implementation UILabel (FixScreenFont)
- (void)setFixWidthScreenFont:(float)fixWidthScreenFont{
if (fixWidthScreenFont > 0 ) {
self.font = [UIFont systemFontOfSize:C_WIDTH(fixWidthScreenFont)];
}else{
self.font = self.font;
}
}
- (float )fixWidthScreenFont{
return self.fixWidthScreenFont;
}
@end
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