iOS工具 - 单项修改Frame成员变量

单项修改成员变量

1 - OC  中是不允许单独修改结构体中成员变量的值，那么我们完全可对 UIView 进行扩展，实现对其尺寸、坐标的单项修改

2 - 代码封装

// - UIView+FrameAddions.h

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@interface UIView (FrameAddions)
@property(nonatomic,assign) CGFloat left;
@property(nonatomic,assign) CGFloat top;
@property(nonatomic,assign) CGFloat right;
@property(nonatomic,assign) CGFloat bottom;

@property(nonatomic,assign) CGFloat width;
@property(nonatomic,assign) CGFloat height;

@property(nonatomic,assign) CGFloat centerX;
@property(nonatomic,assign) CGFloat centerY;

@property(nonatomic,readonly) CGFloat screenX;
@property(nonatomic,readonly) CGFloat screenY;
@property(nonatomic,readonly) CGFloat screenViewX;
@property(nonatomic,readonly) CGFloat screenViewY;
@property(nonatomic,readonly) CGRect screenFrame;

@property(nonatomic) CGPoint origin;
@property(nonatomic) CGSize size;
@property(nonatomic) BOOL visible;

/**
 * Finds the first descendant view (including this view) that is a member of a particular class.
 */
- (UIView*)descendantOrSelfWithClass:(Class)cls;

/**
 * Finds the first ancestor view (including this view) that is a member of a particular class.
 */
- (UIView*)ancestorOrSelfWithClass:(Class)cls;

/**
 * Removes all subviews.
 */
- (void)removeAllSubviews;


/**
 * Calculates the offset of this view from another view in screen coordinates.
 */
- (CGPoint)offsetFromView:(UIView*)otherView;


/**
 * The view controller whose view contains this view.
 */
- (UIViewController*)viewController;

- (void)addSubviews:(NSArray *)views;

+ (UILabel *)labelWithFrame:(CGRect)frame fontSize:(CGFloat)fontSize textAlignment:(NSTextAlignment)alignment text:(NSString *)text;

@end

// - UIView+FrameAddions.m

#import "UIView+FrameAddions.h"

@implementation UIView (FrameAddions)

- (BOOL)visible{
    return !self.hidden;
}

- (void)setVisible:(BOOL)visible{
    self.hidden = !visible;
}

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

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

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

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

- (CGFloat)right {
    return self.frame.origin.x + self.frame.size.width;
}

- (void)setRight:(CGFloat)right {
    CGRect frame = self.frame;
    frame.origin.x = right - frame.size.width;
    self.frame = frame;
}

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

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

- (CGFloat)centerX {
    return self.center.x;
}

- (void)setCenterX:(CGFloat)centerX {
    self.center = CGPointMake(centerX, self.center.y);
}

- (CGFloat)centerY {
    return self.center.y;
}

- (void)setCenterY:(CGFloat)centerY {
    self.center = CGPointMake(self.center.x, centerY);
}

- (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;
}

- (CGFloat)screenX {
    CGFloat x = 0;
    for (UIView* view = self; view; view = view.superview) {
        x += view.left;
    }
    return x;
}

- (CGFloat)screenY {
    CGFloat y = 0;
    for (UIView* view = self; view; view = view.superview) {
        y += view.top;
    }
    return y;
}

- (CGFloat)screenViewX {
    CGFloat x = 0;
    for (UIView* view = self; view; view = view.superview) {
        x += view.left;
        
        if ([view isKindOfClass:[UIScrollView class]]) {
            UIScrollView* scrollView = (UIScrollView*)view;
            x -= scrollView.contentOffset.x;
        }
    }
    
    return x;
}

- (CGFloat)screenViewY {
    CGFloat y = 0;
    for (UIView* view = self; view; view = view.superview) {
        y += view.top;
        
        if ([view isKindOfClass:[UIScrollView class]]) {
            UIScrollView* scrollView = (UIScrollView*)view;
            y -= scrollView.contentOffset.y;
        }
    }
    return y;
}

- (CGRect)screenFrame {
    return CGRectMake(self.screenViewX, self.screenViewY, self.width, self.height);
}

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

- (void)setOrigin:(CGPoint)origin {
    CGRect frame = self.frame;
    frame.origin = origin;
    self.frame = frame;
}

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

- (void)setSize:(CGSize)size {
    CGRect frame = self.frame;
    frame.size = size;
    self.frame = frame;
}

- (CGPoint)offsetFromView:(UIView*)otherView {
    CGFloat x = 0, y = 0;
    for (UIView* view = self; view && view != otherView; view = view.superview) {
        x += view.left;
        y += view.top;
    }
    return CGPointMake(x, y);
}

/*
 - (CGFloat)orientationWidth {
 return UIInterfaceOrientationIsLandscape(TTInterfaceOrientation())
 ? self.height : self.width;
 }
 
 - (CGFloat)orientationHeight {
 return UIInterfaceOrientationIsLandscape(TTInterfaceOrientation())
 ? self.width : self.height;
 }
 */
- (UIView*)descendantOrSelfWithClass:(Class)cls {
    if ([self isKindOfClass:cls])
        return self;
    
    for (UIView* child in self.subviews) {
        UIView* it = [child descendantOrSelfWithClass:cls];
        if (it)
            return it;
    }
    
    return nil;
}

- (UIView*)ancestorOrSelfWithClass:(Class)cls {
    if ([self isKindOfClass:cls]) {
        return self;
    } else if (self.superview) {
        return [self.superview ancestorOrSelfWithClass:cls];
    } else {
        return nil;
    }
}

- (void)removeAllSubviews {
    while (self.subviews.count) {
        UIView* child = self.subviews.lastObject;
        [child removeFromSuperview];
    }
}

- (UIViewController*)viewController {
    for (UIView* next = [self superview]; next; next = next.superview) {
        UIResponder* nextResponder = [next nextResponder];
        if ([nextResponder isKindOfClass:[UIViewController class]]) {
            return (UIViewController*)nextResponder;
        }
    }
    return nil;
}

- (void)addSubviews:(NSArray *)views{
    for (UIView* v in views) {
        [self addSubview:v];
    }
}

+ (UILabel *)labelWithFrame:(CGRect)frame
                   fontSize:(CGFloat)fontSize
              textAlignment:(NSTextAlignment)alignment
                       text:(NSString *)text{
    UILabel *label = [[UILabel alloc] initWithFrame:frame];
    label.backgroundColor = [UIColor clearColor];
    label.font = [UIFont systemFontOfSize:fontSize];
    label.textAlignment = alignment;
    label.text = text;
    label.textColor = [UIColor blackColor];
    label.lineBreakMode = NSLineBreakByWordWrapping;
    //return [label autorelease];
    return label;
}

@end