UIView的扩展类

ExtUIView.h

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@interface UIView (autoresizing)//带margin的左中右层- (void) addSubviewLeft:(UIView *)leftView  middleView:(UIView *)middleView rightView:(UIView *)rightView lefWidth:(CGFloat)lefWidth  rightWidth:(CGFloat)rightWidth margin:(CGRect)marginFrame;//左中右层- (void) addSubviewLeft:(UIView *)leftView  middleView:(UIView *)middleView rightView:(UIView *)rightView lefWidth:(CGFloat)lefWidth  rightWidth:(CGFloat)rightWidth;//上中下层- (void) addSubviewTop:(UIView *)topView  middleView:(UIView *)middleView bottomView:(UIView *)bottomView topHeight:(CGFloat)topHeight  bottomHeight:(CGFloat)bottomHeight;//左上右下 自适应大小来满足margin- (void) addSubview:(UIView *)aView  margin:(CGRect)marginFrame;//自适应margin来满足大小- (void) addSubview:(UIView *)aView  size:(CGSize)aSize;//左上右下 自适应大小来满足margin- (void) setSizeInView:(UIView *)aView margin:(CGRect)marginFrame;//左上右下 自适应margin来满足大小- (void) setCenterInView:(UIView *)aView size:(CGSize)aSize;- (CGPoint) centerPoint;@end

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ExtUIView.m

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#import "ExtUIView.h"@implementation UIView (autoresizing)- (void) addSubviewLeft:(UIView *)leftView  middleView:(UIView *)middleView rightView:(UIView *)rightView lefWidth:(CGFloat)lefWidth  rightWidth:(CGFloat)rightWidth margin:(CGRect)marginFrame {;}- (void) addSubviewLeft:(UIView *)leftView  middleView:(UIView *)middleView rightView:(UIView *)rightView lefWidth:(CGFloat)lefWidth  rightWidth:(CGFloat)rightWidth {if(leftView) {leftView.frame = CGRectMake(0, 0, lefWidth, self.frame.size.height);leftView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleRightMargin;[self addSubview:leftView];}if(middleView) {middleView.frame = CGRectMake(lefWidth, 0, self.frame.size.width - lefWidth - rightWidth, self.frame.size.height);middleView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;[self addSubview:middleView];}if(rightView) {rightView.frame = CGRectMake(self.frame.size.width - rightWidth, 0, rightWidth, self.frame.size.height);rightView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleLeftMargin ;[self addSubview:rightView];}}- (void) addSubviewTop:(UIView *)topView  middleView:(UIView *)middleView bottomView:(UIView *)bottomView topHeight:(CGFloat)topHeight  bottomHeight:(CGFloat)bottomHeight {if(topView) {topView.frame = CGRectMake(0, 0, self.frame.size.width, topHeight);topView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleBottomMargin;[self addSubview:topView];}if(middleView) {middleView.frame = CGRectMake(0, topHeight, self.bounds.size.width, self.frame.size.height - topHeight - bottomHeight);middleView.autoresizingMask =UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth ;[self addSubview:middleView];}if(bottomView) {bottomView.frame = CGRectMake(0, self.frame.size.height - bottomHeight, self.frame.size.width, bottomHeight);bottomView.autoresizingMask = UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleTopMargin ;[self addSubview:bottomView];}}//左上右下- (void) addSubview:(UIView *)aView  margin:(CGRect)marginFrame {if (!aView) return;aView.frame = CGRectMake(marginFrame.origin.x, marginFrame.origin.y, self.frame.size.width - marginFrame.origin.x - marginFrame.size.width, self.frame.size.height - marginFrame.origin.y - marginFrame.size.height);aView.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;[self addSubview:aView];}- (void) addSubview:(UIView *)aView  size:(CGSize)aSize {if (!aView) return;aView.center = [self centerPoint];aView.bounds = CGRectMake(0, 0, aSize.width, aSize.height);aView.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin;[self addSubview:aView];}//左上右下- (void) setSizeInView:(UIView *)aView margin:(CGRect)marginFrame {if (!aView) return;self.frame = CGRectMake(marginFrame.origin.x, marginFrame.origin.y, aView.frame.size.width - marginFrame.origin.x - marginFrame.size.width, aView.frame.size.height - marginFrame.origin.y - marginFrame.size.height);self.autoresizingMask = UIViewAutoresizingFlexibleHeight | UIViewAutoresizingFlexibleWidth;}- (void) setCenterInView:(UIView *)aView size:(CGSize)aSize {if (!aView) return;self.center = [aView centerPoint];self.bounds = CGRectMake(0, 0, aSize.width, aSize.height);self.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleTopMargin |UIViewAutoresizingFlexibleBottomMargin;}- (CGPoint) centerPoint {return CGPointMake(self.frame.size.width / 2, self.frame.size.height / 2);}@end

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示例：

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UIView *v1 = [[[UIView alloc] init] autorelease];UIView *v2 = [[[UIView alloc] init] autorelease];UIView *v3 = [[[UIView alloc] init] autorelease];UIView *v4 = [[[UIView alloc] init] autorelease];UIView *v5 = [[[UIView alloc] init] autorelease];UIView *v6 = [[[UIView alloc] init] autorelease];UIView *v7 = [[[UIView alloc] init] autorelease];UIView *v8 = [[[UIView alloc] init] autorelease];UIView *v9 = [[[UIView alloc] init] autorelease];UIView *v10 = [[[UIView alloc] init] autorelease];UIView *v11 = [[[UIView alloc] init] autorelease];UIView *v12 = [[[UIView alloc] init] autorelease];v1.backgroundColor=[UIColor cyanColor];v2.backgroundColor=[UIColor grayColor];v3.backgroundColor=[UIColor greenColor];v4.backgroundColor=[UIColor greenColor];v5.backgroundColor=[UIColor blackColor];v6.backgroundColor=[UIColor cyanColor];v7.backgroundColor=[UIColor darkGrayColor];v8.backgroundColor=[UIColor lightGrayColor];v9.backgroundColor=[UIColor whiteColor];v10.backgroundColor=[UIColor blackColor];v11.backgroundColor=[UIColor orangeColor];v12.backgroundColor=[UIColor purpleColor];[self.view addSubviewLeft:v1 middleView:v2 rightView:v3 lefWidth:100.0 rightWidth:100.0];[v1 addSubviewTop:v7 middleView:v8 bottomView:v9 topHeight:100 bottomHeight:50];[v8 addSubview:v4 size:CGSizeMake(15, 15)];[v2 addSubview:v5 size:CGSizeMake(55, 55)];[v3 addSubview:v6 size:CGSizeMake(15, 15)];[v9 addSubview:v10 margin:CGRectMake(10, 10, 10, 10)];[v11 setCenterInView:v2 size:CGSizeMake(50, 50)];[v12 setSizeInView:v2 margin:CGRectMake(50, 10, 50, 100)];[v2 addSubview:v11];[v2 addSubview:v12];

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示例图：