3D标签

动态实现3D标签，

主要代码：

//
//  XLMatrix.h
//  XLSphereView
//
//  Created by 史晶晶 on 16/4/4.
//  Copyright © 2016年 xiaolong. All rights reserved.
//

#ifndef XLMatrix_h
#define XLMatrix_h

#import "XLPoint.h"

struct XLMatrix {
    NSInteger column;
    NSInteger row;
    CGFloat matrix[][];
};

typedef struct XLMatrix XLMatrix;

static XLMatrix XLMatrixMake(NSInteger column, NSInteger row) {
    XLMatrix matrix;
    matrix.column = column;
    matrix.row = row;
    for(NSInteger i = ; i < column; i++){
        for(NSInteger j = ; j < row; j++){
            matrix.matrix[i][j] = ;
        }
    }

    return matrix;
}

static XLMatrix XLMatrixMakeFromArray(NSInteger column, NSInteger row, CGFloat *data) {
    XLMatrix matrix = XLMatrixMake(column, row);
    for (int i = ; i < column; i ++) {
        CGFloat *t = data + (i * row);
        for (int j = ; j < row; j++) {
            matrix.matrix[i][j] = *(t + j);
        }
    }
    return matrix;
}

static XLMatrix XLMatrixMutiply(XLMatrix a, XLMatrix b) {
    XLMatrix result = XLMatrixMake(a.column, b.row);
    for(NSInteger i = ; i < a.column; i ++){
        for(NSInteger j = ; j < b.row; j ++){
            for(NSInteger k = ; k < a.row; k++){
                result.matrix[i][j] += a.matrix[i][k] * b.matrix[k][j];
            }
        }
    }
    return result;
}

static XLPoint XLPointMakeRotation(XLPoint point, XLPoint direction, CGFloat angle) {
    //    CGFloat temp1[4] = {direction.x, direction.y, direction.z, 1};
    //    XLMatrix directionM = XLMatrixMakeFromArray(1, 4, temp1);
    if (angle == ) {
        return point;
    }

    CGFloat temp2[][] = {point.x, point.y, point.z, };
    //    XLMatrix pointM = XLMatrixMakeFromArray(1, 4, *temp2);

    XLMatrix result = XLMatrixMakeFromArray(, , *temp2);

    if (direction.z * direction.z + direction.y * direction.y != ) {
        CGFloat cos1 = direction.z / sqrt(direction.z * direction.z + direction.y * direction.y);
        CGFloat sin1 = direction.y / sqrt(direction.z * direction.z + direction.y * direction.y);
        CGFloat t1[][] = {{, , , }, {, cos1, sin1, }, {, -sin1, cos1, }, {, , , }};
        XLMatrix m1 = XLMatrixMakeFromArray(, , *t1);
        result = XLMatrixMutiply(result, m1);
    }

    if (direction.x * direction.x + direction.y * direction.y + direction.z * direction.z != ) {
        CGFloat cos2 = sqrt(direction.y * direction.y + direction.z * direction.z) / sqrt(direction.x * direction.x + direction.y * direction.y + direction.z * direction.z);
        CGFloat sin2 = -direction.x / sqrt(direction.x * direction.x + direction.y * direction.y + direction.z * direction.z);
        CGFloat t2[][] = {{cos2, , -sin2, }, {, , , }, {sin2, , cos2, }, {, , , }};
        XLMatrix m2 = XLMatrixMakeFromArray(, , *t2);
        result = XLMatrixMutiply(result, m2);
    }

    CGFloat cos3 = cos(angle);
    CGFloat sin3 = sin(angle);
    CGFloat t3[][] = {{cos3, sin3, , }, {-sin3, cos3, , }, {, , , }, {, , , }};
    XLMatrix m3 = XLMatrixMakeFromArray(, , *t3);
    result = XLMatrixMutiply(result, m3);

    if (direction.x * direction.x + direction.y * direction.y + direction.z * direction.z != ) {
        CGFloat cos2 = sqrt(direction.y * direction.y + direction.z * direction.z) / sqrt(direction.x * direction.x + direction.y * direction.y + direction.z * direction.z);
        CGFloat sin2 = -direction.x / sqrt(direction.x * direction.x + direction.y * direction.y + direction.z * direction.z);
        CGFloat t2_[][] = {{cos2, , sin2, }, {, , , }, {-sin2, , cos2, }, {, , , }};
        XLMatrix m2_ = XLMatrixMakeFromArray(, , *t2_);
        result = XLMatrixMutiply(result, m2_);
    }

    if (direction.z * direction.z + direction.y * direction.y != ) {
        CGFloat cos1 = direction.z / sqrt(direction.z * direction.z + direction.y * direction.y);
        CGFloat sin1 = direction.y / sqrt(direction.z * direction.z + direction.y * direction.y);
        CGFloat t1_[][] = {{, , , }, {, cos1, -sin1, }, {, sin1, cos1, }, {, , , }};
        XLMatrix m1_ = XLMatrixMakeFromArray(, , *t1_);
        result = XLMatrixMutiply(result, m1_);
    }

    XLPoint resultPoint = XLPointMake(result.matrix[][], result.matrix[][], result.matrix[][]);

    return resultPoint;
}

#endif /* XLMatrix_h */

 //
 //  ViewController.m
 //  XLSphereView
 //
 //  Created by 史晶晶 on 16/4/4.
 //  Copyright © 2016年 xiaolong. All rights reserved.
 //

 #import "ViewController.h"
 #import "XLSphereView.h"

 @interface ViewController ()

 @property (nonatomic,strong) XLSphereView *sphereView;

 @end

 @implementation ViewController

 - (void)viewDidLoad {
     [super viewDidLoad];

     self.view.backgroundColor = [UIColor blackColor];
     CGFloat sphereViewW = self.view.frame.size.width -  * ;
     CGFloat sphereViewH = sphereViewW;
     _sphereView = [[XLSphereView alloc] initWithFrame:CGRectMake(, , sphereViewW, sphereViewH)];
     NSMutableArray *array = [[NSMutableArray alloc] initWithCapacity:];
     for (NSInteger i = ; i < ; i ++) {
         UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem];
         [btn setTitle:[NSString stringWithFormat:@"晶%ld", i] forState:UIControlStateNormal];
         btn.titleLabel.font = [UIFont systemFontOfSize: 7.0];
         btn.backgroundColor = [UIColor colorWithRed:arc4random_uniform()/. green:arc4random_uniform()/. blue:arc4random_uniform()/. alpha:.];
         [btn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
         btn.titleLabel.font = [UIFont systemFontOfSize:.];
         btn.frame = CGRectMake(, , , );
         btn.layer.cornerRadius = ;
         btn.clipsToBounds = YES;
         [btn addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];
         [array addObject:btn];
         [_sphereView addSubview:btn];
     }
     [_sphereView setItems:array];
     [self.view addSubview:_sphereView];

 }

 - (void)buttonPressed:(UIButton *)btn
 {
     [_sphereView timerStop];

     [UIView animateWithDuration:0.3 animations:^{
         btn.transform = CGAffineTransformMakeScale(., .);
     } completion:^(BOOL finished) {
         [UIView animateWithDuration:0.3 animations:^{
             btn.transform = CGAffineTransformMakeScale(., .);
         } completion:^(BOOL finished) {
             [_sphereView timerStart];
         }];
     }];
 }

 - (void)didReceiveMemoryWarning {
     [super didReceiveMemoryWarning];
     // Dispose of any resources that can be recreated.
 }

 @end

demo截图

下载地址：

https://github.com/henusjj/Label-effect