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最新推荐文章于 2025-04-01 16:14:02 发布

Johnny Tong

最新推荐文章于 2025-04-01 16:14:02 发布

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CC 4.0 BY-SA版权

分类专栏： Mac OS 文章标签： mac 布局

本文链接：https://blog.youkuaiyun.com/tongwei117/article/details/78436208

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本文介绍了一个针对SwiftUI视图属性的封装方法，通过Objective-C实现，方便开发者快速调整视图的位置、尺寸等属性，并提供了自动布局约束的示例。

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#import "NSView+TWFrame.h"

@implementation NSView (TWFrame)


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

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

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

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


// 返回高度
-(CGFloat)height {
    return  self.frame.size.height;
}

- (void)setHeight:(CGFloat)newheight
{
    CGRect newframe = self.frame;
    newframe.size.height = newheight;
    self.frame = newframe;
}
//  返回宽度
- (CGFloat)width
{
    return self.frame.size.width;
}

//  设置宽度
- (void)setWidth:(CGFloat)newwidth
{
    CGRect newframe = self.frame;
    newframe.size.width = newwidth;
    self.frame = newframe;
}

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

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

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

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

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

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

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

- (void)setRight:(CGFloat)newright
{
    CGFloat delta = newright - (self.frame.origin.x + self.frame.size.width);
    CGRect newframe = self.frame;
    newframe.origin.x += delta ;
    self.frame = newframe;
}

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

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

@end

使用autolayout

UIView *purpleView = [[UIView alloc] init];
    purpleView.backgroundColor = [UIColor purpleColor];
    // 禁止将 AutoresizingMask 转换为 Constraints
    purpleView.translatesAutoresizingMaskIntoConstraints = NO;
    [self.view addSubview:purpleView];

    // 添加 width 约束
    NSLayoutConstraint *widthConstraint = [NSLayoutConstraint constraintWithItem:purpleView attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:0.0 constant:150];
    [purpleView addConstraint:widthConstraint];
    // 添加 height 约束
    NSLayoutConstraint *heightConstraint = [NSLayoutConstraint constraintWithItem:purpleView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:0.0 constant:150];
    [purpleView addConstraint:heightConstraint];
    // 添加 left 约束
    NSLayoutConstraint *leftConstraint = [NSLayoutConstraint constraintWithItem:purpleView attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeLeft multiplier:1.0 constant:100];
    [self.view addConstraint:leftConstraint];
    // 添加 top 约束
    NSLayoutConstraint *topConstraint = [NSLayoutConstraint constraintWithItem:purpleView attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeTop multiplier:1.0 constant:200];
    [self.view addConstraint:topConstraint];

增加布局

@implementation NSView (ZCAddition)
- (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.left+self.width/2;
}

- (void)setCenterX:(CGFloat)centerX {
    CGRect frame = self.frame;
    frame.origin.x = self.left+centerX;
    self.frame = frame;
}

- (CGFloat)centerY {
    return self.top+self.height/2;
}

- (void)setCenterY:(CGFloat)centerY {
    CGRect frame = self.frame;
    frame.origin.y = self.top+centerY;
    self.frame = frame;
}

- (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)ttScreenX {
    CGFloat x = 0;
    for (NSView* view = self; view; view = view.superview) {
        x += [view left];
    }
    return x;
}

- (CGFloat)ttScreenY {
    CGFloat y = 0;
    for (NSView* view = self; view; view = view.superview) {
        y += [view top];
    }
    return y;
}

- (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;
}

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

- (NSString*)description {
    NSMutableString* description = [NSMutableString stringWithString:[super description]];
    [description appendString:[NSString stringWithFormat:@"Frame: (%f, %f, %f, %f)\ttag:%ld", 
                               self.frame.origin.x,
                               self.frame.origin.y, self.frame.size.width, self.frame.size.height, (long)self.tag]];
    return description;
}

- (void)makeTextClear {
    self.frame = CGRectMake(ceilf(ceilf(self.frame.origin.x)/2)*2,
                            ceilf(ceilf(self.frame.origin.y)/2)*2,
                            ceilf(ceilf(self.frame.size.width)/2)*2,
                            ceilf(ceilf(self.frame.size.height)/2)*2);
}