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[4][4]; }; typedef struct XLMatrix XLMatrix; static XLMatrix XLMatrixMake(NSInteger column, NSInteger row) { XLMatrix matrix; matrix.column = column; matrix.row = row; for(NSInteger i = 0; i < column; i++){ for(NSInteger j = 0; j < row; j++){ matrix.matrix[i][j] = 0; } } return matrix; } static XLMatrix XLMatrixMakeFromArray(NSInteger column, NSInteger row, CGFloat *data) { XLMatrix matrix = XLMatrixMake(column, row); for (int i = 0; i < column; i ++) { CGFloat *t = data + (i * row); for (int j = 0; 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 = 0; i < a.column; i ++){ for(NSInteger j = 0; j < b.row; j ++){ for(NSInteger k = 0; 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 == 0) { return point; } CGFloat temp2[1][4] = {point.x, point.y, point.z, 1}; // XLMatrix pointM = XLMatrixMakeFromArray(1, 4, *temp2); XLMatrix result = XLMatrixMakeFromArray(1, 4, *temp2); if (direction.z * direction.z + direction.y * direction.y != 0) { 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[4][4] = {{1, 0, 0, 0}, {0, cos1, sin1, 0}, {0, -sin1, cos1, 0}, {0, 0, 0, 1}}; XLMatrix m1 = XLMatrixMakeFromArray(4, 4, *t1); result = XLMatrixMutiply(result, m1); } if (direction.x * direction.x + direction.y * direction.y + direction.z * direction.z != 0) { 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[4][4] = {{cos2, 0, -sin2, 0}, {0, 1, 0, 0}, {sin2, 0, cos2, 0}, {0, 0, 0, 1}}; XLMatrix m2 = XLMatrixMakeFromArray(4, 4, *t2); result = XLMatrixMutiply(result, m2); } CGFloat cos3 = cos(angle); CGFloat sin3 = sin(angle); CGFloat t3[4][4] = {{cos3, sin3, 0, 0}, {-sin3, cos3, 0, 0}, {0, 0, 1, 0}, {0, 0, 0, 1}}; XLMatrix m3 = XLMatrixMakeFromArray(4, 4, *t3); result = XLMatrixMutiply(result, m3); if (direction.x * direction.x + direction.y * direction.y + direction.z * direction.z != 0) { 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_[4][4] = {{cos2, 0, sin2, 0}, {0, 1, 0, 0}, {-sin2, 0, cos2, 0}, {0, 0, 0, 1}}; XLMatrix m2_ = XLMatrixMakeFromArray(4, 4, *t2_); result = XLMatrixMutiply(result, m2_); } if (direction.z * direction.z + direction.y * direction.y != 0) { 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_[4][4] = {{1, 0, 0, 0}, {0, cos1, -sin1, 0}, {0, sin1, cos1, 0}, {0, 0, 0, 1}}; XLMatrix m1_ = XLMatrixMakeFromArray(4, 4, *t1_); result = XLMatrixMutiply(result, m1_); } XLPoint resultPoint = XLPointMake(result.matrix[0][0], result.matrix[0][1], result.matrix[0][2]); return resultPoint; } #endif /* XLMatrix_h */
1 // 2 // ViewController.m 3 // XLSphereView 4 // 5 // Created by 史晶晶 on 16/4/4. 6 // Copyright © 2016年 xiaolong. All rights reserved. 7 // 8 9 #import "ViewController.h" 10 #import "XLSphereView.h" 11 12 @interface ViewController () 13 14 @property (nonatomic,strong) XLSphereView *sphereView; 15 16 @end 17 18 @implementation ViewController 19 20 - (void)viewDidLoad { 21 [super viewDidLoad]; 22 23 self.view.backgroundColor = [UIColor blackColor]; 24 CGFloat sphereViewW = self.view.frame.size.width - 30 * 2; 25 CGFloat sphereViewH = sphereViewW; 26 _sphereView = [[XLSphereView alloc] initWithFrame:CGRectMake(30, 100, sphereViewW, sphereViewH)]; 27 NSMutableArray *array = [[NSMutableArray alloc] initWithCapacity:0]; 28 for (NSInteger i = 0; i < 40; i ++) { 29 UIButton *btn = [UIButton buttonWithType:UIButtonTypeSystem]; 30 [btn setTitle:[NSString stringWithFormat:@"晶%ld", i] forState:UIControlStateNormal]; 31 btn.titleLabel.font = [UIFont systemFontOfSize: 7.0]; 32 btn.backgroundColor = [UIColor colorWithRed:arc4random_uniform(255)/255. green:arc4random_uniform(255)/255. blue:arc4random_uniform(255)/255. alpha:1.]; 33 [btn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; 34 btn.titleLabel.font = [UIFont systemFontOfSize:24.]; 35 btn.frame = CGRectMake(0, 0, 60, 30); 36 btn.layer.cornerRadius = 3; 37 btn.clipsToBounds = YES; 38 [btn addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside]; 39 [array addObject:btn]; 40 [_sphereView addSubview:btn]; 41 } 42 [_sphereView setItems:array]; 43 [self.view addSubview:_sphereView]; 44 45 } 46 47 - (void)buttonPressed:(UIButton *)btn 48 { 49 [_sphereView timerStop]; 50 51 [UIView animateWithDuration:0.3 animations:^{ 52 btn.transform = CGAffineTransformMakeScale(2., 2.); 53 } completion:^(BOOL finished) { 54 [UIView animateWithDuration:0.3 animations:^{ 55 btn.transform = CGAffineTransformMakeScale(1., 1.); 56 } completion:^(BOOL finished) { 57 [_sphereView timerStart]; 58 }]; 59 }]; 60 } 61 62 - (void)didReceiveMemoryWarning { 63 [super didReceiveMemoryWarning]; 64 // Dispose of any resources that can be recreated. 65 } 66 67 @end
demo截图
下载地址：
https://github.com/henusjj/Label-effect