YYText/Demo/YYTextDemo/UIView+YYAdd.h

//
//  UIView+YYAdd.h
//  YYCategories <https://github.com/ibireme/YYCategories>
//
//  Created by ibireme on 13/4/3.
//  Copyright (c) 2015 ibireme.
//
//  This source code is licensed under the MIT-style license found in the
//  LICENSE file in the root directory of this source tree.
//

#import <UIKit/UIKit.h>

/**
 Provides extensions for `UIView`.
 */
@interface UIView (YYAdd)

/**
 Shortcut to set the view.layer's shadow
 
 @param color  Shadow Color
 @param offset Shadow offset
 @param radius Shadow radius
 */
- (void)setLayerShadow:(UIColor*)color offset:(CGSize)offset radius:(CGFloat)radius;

/**
 Remove all subviews.
 
 @warning Never call this method inside your view's drawRect: method.
 */
- (void)removeAllSubviews;

/**
 Returns the view's view controller (may be nil).
 */
@property (nonatomic, readonly) UIViewController *viewController;

@property (nonatomic) CGFloat left;        ///< Shortcut for frame.origin.x.
@property (nonatomic) CGFloat top;         ///< Shortcut for frame.origin.y
@property (nonatomic) CGFloat right;       ///< Shortcut for frame.origin.x + frame.size.width
@property (nonatomic) CGFloat bottom;      ///< Shortcut for frame.origin.y + frame.size.height
@property (nonatomic) CGFloat width;       ///< Shortcut for frame.size.width.
@property (nonatomic) CGFloat height;      ///< Shortcut for frame.size.height.
@property (nonatomic) CGFloat centerX;     ///< Shortcut for center.x
@property (nonatomic) CGFloat centerY;     ///< Shortcut for center.y
@property (nonatomic) CGPoint origin;      ///< Shortcut for frame.origin.
@property (nonatomic) CGSize  size;        ///< Shortcut for frame.size.

@end


double YYDeviceSystemVersion();

#ifndef kSystemVersion
#define kSystemVersion YYDeviceSystemVersion()
#endif

#ifndef kiOS6Later
#define kiOS6Later (kSystemVersion >= 6)
#endif

#ifndef kiOS7Later
#define kiOS7Later (kSystemVersion >= 7)
#endif

#ifndef kiOS8Later
#define kiOS8Later (kSystemVersion >= 8)
#endif

#ifndef kiOS9Later
#define kiOS9Later (kSystemVersion >= 9)
#endif

CGSize YYDeviceScreenSize();


/// 屏幕宽度
#ifndef kScreenWidth
#define kScreenWidth YYDeviceScreenSize().width
#endif

/// 屏幕高度
#ifndef kScreenHeight
#define kScreenHeight YYDeviceScreenSize().height
#endif

/// 屏幕大小
#ifndef kScreenSize
#define kScreenSize YYDeviceScreenSize()
#endif

/// 屏幕Scale
#ifndef kScreenScale
#define kScreenScale [UIScreen mainScreen].scale
#endif





/*
 Create UIColor with a hex string.
 Example: UIColorHex(0xF0F), UIColorHex(66ccff), UIColorHex(#66CCFF88)
 
 Valid format: #RGB #RGBA #RRGGBB #RRGGBBAA 0xRGB ...
 The `#` or "0x" sign is not required.
 */
#ifndef UIColorHex
#define UIColorHex(_hex_)   [UIColor colorWithHexString:((__bridge NSString *)CFSTR(#_hex_))]
#endif



@interface UIColor (YYAdd)

/**
 Creates and returns a color object from hex string.
 
 @discussion:
 Valid format: #RGB #RGBA #RRGGBB #RRGGBBAA 0xRGB ...
 The `#` or "0x" sign is not required.
 The alpha will be set to 1.0 if there is no alpha component.
 It will return nil when an error occurs in parsing.
 
 Example: @"0xF0F", @"66ccff", @"#66CCFF88"
 
 @param hexStr  The hex string value for the new color.
 
 @return        An UIColor object from string, or nil if an error occurs.
 */
+ (UIColor *)colorWithHexString:(NSString *)hexStr;

/**
 Creates and returns a color object by add new color.
 
 @param add        the color added
 
 @param blendMode  add color blend mode
 */
- (UIColor *)colorByAddColor:(UIColor *)add blendMode:(CGBlendMode)blendMode;

@end