引言
UIImagePickerController确实非常强大，但是雨MPMoviePlayerController类似，由于它的高度封装性，要进行某些自定义工作就比较复杂了。例如要做出一款类似于美颜相机的拍照界面就比较难以实现了，此时就可以考虑使用AVFoundation来实现。AVFoundation中提供了很多现成的播放器和录音机，但是事实上他还有更加底层的内容可以供开发者使用。因为AVFoundation中抽了很多和底层输入，输出设备打交道的类，依靠这些类开发人员面对的不再是封装好的音频播放器AVAudioPlayer、录音机（AVAudioRecorder）、视频（包括音频）播放器AVPlayer，而是输入设备（例如麦克风、摄像头）、输出设备（图片、视频）等。首先了解一下使用AVFoundation做拍照和视频录制开发用到的相关类：
- AVCaptureSession：媒体（音、视频）捕获会话，负责把捕获的音视频数据输出到输出设备中。一个AVCaptureSession可以有多个输入输出：如图：
AVCaptureSession可以有多个输入输出
- AVCaptureDevice：输入设备，包括麦克风、摄像头，通过该对象可以设置物理设备的一些属性（例如相机聚焦、白平衡等）。
- AVCaptureDeviceInput：设备输入数据管理对象，可以根据AVCaptureDevice创建对应的AVCaptureDeviceInput对象，该对象将会被添加到AVCaptureSession中管理。
- AVCaptureOutput：输出数据管理对象，用于接收各类输出数据，通常使用对应的子类AVCaptureAudioDataOutput、AVCaptureStillImageOutput、AVCaptureVideoDataOutput、AVCaptureFileOutput，该对象将会被添加到AVCaptureSession中管理。注意：前面几个对象的输出数据都是NSData类型，而AVCaptureFileOutput代表数据以文件形式输出，类似的，AVCcaptureFileOutput也不会直接创建使用，通常会使用其子类：AVCaptureAudioFileOutput、AVCaptureMovieFileOutput。当把一个输入或者输出添加到AVCaptureSession之后AVCaptureSession就会在所有相符的输入、输出设备之间建立连接（AVCaptionConnection）：
输入、输出设备之间建立连接
- AVCaptureVideoPreviewLayer：相机拍摄预览图层，是CALayer的子类，使用该对象可以实时查看拍照或视频录制效果，创建该对象需要指定对应的AVCaptureSession对象。
使用AVFoundation拍照和录制视频的一般步骤如下：
- 创建AVCaptureSession对象。
- 使用AVCaptureDevice的静态方法获得需要使用的设备，例如拍照和录像就需要获得摄像头设备，录音就要获得麦克风设备。
- 利用输入设备AVCaptureDevice初始化AVCaptureDeviceInput对象。
- 初始化输出数据管理对象，如果要拍照就初始化AVCaptureStillImageOutput对象；如果拍摄视频就初始化AVCaptureMovieFileOutput对象。
- 将数据输入对象AVCaptureDeviceInput、数据输出对象AVCaptureOutput添加到媒体会话管理对象AVCaptureSession中。
- 创建视频预览图层AVCaptureVideoPreviewLayer并指定媒体会话，添加图层到显示容器中，调用AVCaptureSession的startRuning方法开始捕获。
- 将捕获的音频或视频数据输出到指定文件。
下面看一下如何使用AVFoundation实现一个拍照程序，在这个程序中将实现摄像头预览、切换前后摄像头、闪光灯设置、对焦、拍照保存等功能。应用大致效果如下：
#import "AVCostomAVViewController.h"
#import <AVFoundation/AVFoundation.h>
#import <AssetsLibrary/AssetsLibrary.h>
#define ScreenWith [UIScreen mainScreen].bounds.size.width
#define ScreenHeight [UIScreen mainScreen].bounds.size.height
typedef void(^PropertyChangeBlock) (AVCaptureDevice * captureDevice);
@interface AVCostomAVViewController ()<AVCaptureFileOutputRecordingDelegate>//视频文件输出代理
//负责输入和输出设备之间的数据传输
@property (nonatomic, strong) AVCaptureSession * captureSession;
//负责从AVCaptureDevice获得输入数据
@property (nonatomic, strong) AVCaptureDeviceInput * captureDeviceInput;
//照片输出流
@property (nonatomic, strong) AVCaptureStillImageOutput * captureStillImageOutput;
//视频输出流
@property (nonatomic, strong) AVCaptureMovieFileOutput * captureMovieFileOutPut;
@property (assign,nonatomic) UIBackgroundTaskIdentifier backgroundTaskIdentifier;//后台任务标识
//相机拍摄预览图层
@property (nonatomic, strong) AVCaptureVideoPreviewLayer * captureVideoPreviewLayer;
@property (nonatomic, strong) UIView * contentView;
//拍照按钮
@property (nonatomic, strong) UIButton * takeButton;
//视频录制按钮
@property (nonatomic, strong) UIButton * videoButton;
//自动闪光灯按钮
@property (nonatomic, strong) UIButton * flashAutoButton;
//打开闪光灯按钮
@property (nonatomic, strong) UIButton * flashOnButton;
//关闭闪光灯按钮
@property (nonatomic, strong) UIButton * flashOffButton;
//切换前后摄像头
@property (nonatomic, strong) UIButton * exchangeCamera;
//聚焦光标
@property (nonatomic, strong) UIImageView * focusCursor;
@end
@implementation AVCostomAVViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
self.view.backgroundColor = [UIColor whiteColor];
self.title = @"自定义拍照和视频录制控件";
[self setupUI];
[self initCamera];
[self.captureSession startRunning];
}
- (void)viewDidAppear:(BOOL)animated{
[super viewDidAppear:animated];
}
- (void)viewDidDisappear:(BOOL)animated{
[super viewDidDisappear:animated];
[self.captureSession stopRunning];
}
- (void)dealloc{
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
#pragma mark - 摄像头初始化
- (void)initCamera{
//初始化会话
_captureSession = [[AVCaptureSession alloc] init];
//设置分辨率
if ([_captureSession canSetSessionPreset:AVCaptureSessionPreset1280x720]) {
_captureSession.sessionPreset=AVCaptureSessionPreset1280x720;
}
//获得输入设备
AVCaptureDevice * captureDevice = [self getCameraDeviceWithPosition:AVCaptureDevicePositionBack];
if (!captureDevice) {
NSLog(@"取得后置摄像头时出现问题。");
return;
}
NSError * error = nil;
//添加一个音频输入设备
AVCaptureDevice * audioCaptureDevice = [[AVCaptureDevice devicesWithMediaType:AVMediaTypeAudio] firstObject];
AVCaptureDeviceInput * audioCaptureDeviceInput = [[AVCaptureDeviceInput alloc] initWithDevice:audioCaptureDevice error:&error];
if (error) {
NSLog(@"获得设备输入对象时出错，错误原因：%@",error.localizedDescription);
return;
}
_captureMovieFileOutPut = [[AVCaptureMovieFileOutput alloc] init];
//根据输入设备初始化设备输入对象，用于获得输入数据
_captureDeviceInput = [[AVCaptureDeviceInput alloc]initWithDevice:captureDevice error:&error];
if (error) {
NSLog(@"取得设备输入对象时出错，错误原因：%@",error.localizedDescription);
return;
}
//初始化设备输出对象，用于获得输出数据
_captureStillImageOutput = [[AVCaptureStillImageOutput alloc] init];
NSDictionary * outputSettings = @{AVVideoCodecKey:AVVideoCodecJPEG};
//输出设置
[_captureStillImageOutput setOutputSettings:outputSettings];
//将设备输入添加到会话中
if ([_captureSession canAddInput:_captureDeviceInput]) {
[_captureSession addInput:_captureDeviceInput];
[_captureSession addInput:audioCaptureDeviceInput];
AVCaptureConnection * captureConnection = [_captureMovieFileOutPut connectionWithMediaType:AVMediaTypeVideo];
;
if ([captureConnection isVideoStabilizationSupported]) {
captureConnection.preferredVideoStabilizationMode= AVCaptureVideoStabilizationModeAuto;
}
}
//将设输出添加到会话中
if ([_captureSession canAddOutput:_captureStillImageOutput]) {
[_captureSession addOutput:_captureStillImageOutput];
}
if ([_captureSession canAddOutput:_captureMovieFileOutPut]) {
[_captureSession addOutput:_captureMovieFileOutPut];
}
//创建视频预览层，用于实时展示摄像头状态
_captureVideoPreviewLayer = [[AVCaptureVideoPreviewLayer alloc]initWithSession:self.captureSession];
CALayer * layer = self.contentView.layer;
layer.masksToBounds = YES;
_captureVideoPreviewLayer.frame = layer.bounds;
//填充模式
_captureVideoPreviewLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
//将视频预览层添加到界面中
[layer insertSublayer:_captureVideoPreviewLayer below:self.focusCursor.layer];
[self addNotificationToCaptureDevice:captureDevice];
[self addGenstureRecognizer];
[self setFlashModeButtonStatus];
}
#pragma mark - 视频输出代理
-(void)captureOutput:(AVCaptureFileOutput *)captureOutput didStartRecordingToOutputFileAtURL:(NSURL *)fileURL fromConnections:(NSArray *)connections{
NSLog(@"开始录制...");
}
-(void)captureOutput:(AVCaptureFileOutput *)captureOutput didFinishRecordingToOutputFileAtURL:(NSURL *)outputFileURL fromConnections:(NSArray *)connections error:(NSError *)error{
NSLog(@"视频录制完成.");
//视频录入完成之后在后台将视频存储到相簿
// self.enableRotation=YES;
UIBackgroundTaskIdentifier lastBackgroundTaskIdentifier=self.backgroundTaskIdentifier;
self.backgroundTaskIdentifier=UIBackgroundTaskInvalid;
ALAssetsLibrary *assetsLibrary=[[ALAssetsLibrary alloc]init];
[assetsLibrary writeVideoAtPathToSavedPhotosAlbum:outputFileURL completionBlock:^(NSURL *assetURL, NSError *error) {
if (error) {
NSLog(@"保存视频到相簿过程中发生错误，错误信息：%@",error.localizedDescription);
}
if (lastBackgroundTaskIdentifier!=UIBackgroundTaskInvalid) {
[[UIApplication sharedApplication] endBackgroundTask:lastBackgroundTaskIdentifier];
}
NSLog(@"成功保存视频到相簿.");
}];
}
#pragma mark - 摄像头相关
// 给输入设备添加通知
-(void)addNotificationToCaptureDevice:(AVCaptureDevice *)captureDevice{
//注意添加区域改变捕获通知必须首先设置设备允许捕获
[self changeDeviceProperty:^(AVCaptureDevice *captureDevice) {
captureDevice.subjectAreaChangeMonitoringEnabled=YES;
}];
NSNotificationCenter *notificationCenter= [NSNotificationCenter defaultCenter];
//捕获区域发生改变
[notificationCenter addObserver:self selector:@selector(areaChange:) name:AVCaptureDeviceSubjectAreaDidChangeNotification object:captureDevice];
}
-(void)removeNotificationFromCaptureDevice:(AVCaptureDevice *)captureDevice{
NSNotificationCenter *notificationCenter= [NSNotificationCenter defaultCenter];
[notificationCenter removeObserver:self name:AVCaptureDeviceSubjectAreaDidChangeNotification object:captureDevice];
}
-(void)removeNotification{
NSNotificationCenter *notificationCenter= [NSNotificationCenter defaultCenter];
[notificationCenter removeObserver:self];
}
-(void)addNotificationToCaptureSession:(AVCaptureSession *)captureSession{
NSNotificationCenter *notificationCenter= [NSNotificationCenter defaultCenter];
//会话出错
[notificationCenter addObserver:self selector:@selector(sessionRuntimeError:) name:AVCaptureSessionRuntimeErrorNotification object:captureSession];
}
//屏幕旋转时调整视频预览图层的方向
-(void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration{
AVCaptureConnection *captureConnection=[self.captureVideoPreviewLayer connection];
captureConnection.videoOrientation=(AVCaptureVideoOrientation)toInterfaceOrientation;
}
//旋转后重新设置大小
-(void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation{
_captureVideoPreviewLayer.frame=self.contentView.bounds;
}
//获取指定位置的摄像头
- (AVCaptureDevice *)getCameraDeviceWithPosition:(AVCaptureDevicePosition) positon{
NSArray * cameras = [AVCaptureDevice devicesWithMediaType:AVMediaTypeVideo];
for (AVCaptureDevice * camera in cameras) {
if ([camera position] == positon) {
return camera;
}
}
return nil;
}
//属性改变操作
- (void)changeDeviceProperty:(PropertyChangeBlock ) propertyChange{
AVCaptureDevice * captureDevice = [self.captureDeviceInput device];
NSError * error;
//注意改变设备属性前一定要首先调用lockForConfiguration:调用完之后使用unlockForConfiguration方法解锁
if ([captureDevice lockForConfiguration:&error]) {
propertyChange(captureDevice);
[captureDevice unlockForConfiguration];
} else {
NSLog(@"设置设备属性过程发生错误，错误信息：%@", error.localizedDescription);
}
}
//设置闪光灯模式
- (void)setFlashMode:(AVCaptureFlashMode ) flashMode{
[self changeDeviceProperty:^(AVCaptureDevice *captureDevice) {
if ([captureDevice isFlashModeSupported:flashMode]) {
[captureDevice setFlashMode:flashMode];
}
}];
}
//聚焦模式
- (void)setFocusMode:(AVCaptureFocusMode) focusMode{
[self changeDeviceProperty:^(AVCaptureDevice *captureDevice) {
if ([captureDevice isFocusModeSupported:focusMode]) {
[captureDevice setFocusMode:focusMode];
}
}];
}
//设置曝光模式
- (void)setExposureMode:(AVCaptureExposureMode) exposureMode{
[self changeDeviceProperty:^(AVCaptureDevice *captureDevice) {
if ([captureDevice isExposureModeSupported:exposureMode]) {
[captureDevice setExposureMode:exposureMode];
}
}];
}
//设置聚焦点
- (void)focusWithMode:(AVCaptureFocusMode)focusMode exposureMode:(AVCaptureExposureMode)exposureMode atPoint:(CGPoint)point{
[self changeDeviceProperty:^(AVCaptureDevice *captureDevice) {
if ([captureDevice isFocusModeSupported:focusMode]) {
[captureDevice setFocusMode:AVCaptureFocusModeAutoFocus];
}
if ([captureDevice isFocusPointOfInterestSupported]) {
[captureDevice setFocusPointOfInterest:point];
}
if ([captureDevice isExposureModeSupported:exposureMode]) {
[captureDevice setExposureMode:AVCaptureExposureModeAutoExpose];
}
if ([captureDevice isExposurePointOfInterestSupported]) {
[captureDevice setExposurePointOfInterest:point];
}
}];
}
//添加点击手势，点按时聚焦
- (void)addGenstureRecognizer{
UITapGestureRecognizer * tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapScreen:)];
[self.contentView addGestureRecognizer:tapGesture];
}
//设置闪关灯按钮状态
- (void)setFlashModeButtonStatus{
AVCaptureDevice * captureDevice = [self.captureDeviceInput device];
AVCaptureFlashMode flashMode = captureDevice.flashMode;
if ([captureDevice isFlashAvailable]) {
self.flashAutoButton.hidden = NO;
self.flashOnButton.hidden = NO;
self.flashOffButton.hidden = NO;
self.flashAutoButton.enabled = YES;
self.flashOnButton.enabled = YES;
self.flashOffButton.enabled = YES;
switch (flashMode) {
case AVCaptureFlashModeAuto:
self.flashAutoButton.enabled = NO;
break;
case AVCaptureFlashModeOn:
self.flashOnButton.enabled = NO;
break;
case AVCaptureFlashModeOff:
self.flashOffButton.enabled = NO;
break;
default:
break;
}
} else {
self.flashAutoButton.hidden = YES;
self.flashOnButton.hidden = YES;
self.flashOffButton.hidden = YES;
}
}
//设置聚焦光标位置
- (void)setFocusCursorWithPoint:(CGPoint)point{
self.focusCursor.center = point;
self.focusCursor.transform = CGAffineTransformMakeScale(1.5, 1.5);
self.focusCursor.alpha = 1.0;
[UIView animateWithDuration:1.0 animations:^{
self.focusCursor.transform = CGAffineTransformIdentity;
} completion:^(BOOL finished) {
self.focusCursor.alpha=0;
}];
}
/**
* 设备连接成功
*
* @param notification 通知对象
*/
-(void)deviceConnected:(NSNotification *)notification{
NSLog(@"设备已连接...");
}
/**
* 设备连接断开
*
* @param notification 通知对象
*/
-(void)deviceDisconnected:(NSNotification *)notification{
NSLog(@"设备已断开.");
}
/**
* 捕获区域改变
*
* @param notification 通知对象
*/
-(void)areaChange:(NSNotification *)notification{
NSLog(@"捕获区域改变...");
}
/**
* 会话出错
*
* @param notification 通知对象
*/
-(void)sessionRuntimeError:(NSNotification *)notification{
NSLog(@"会话发生错误.");
}
#pragma mark - 点击方法
- (void)tapScreen:(UITapGestureRecognizer *) tapGesture{
CGPoint point = [tapGesture locationInView:self.contentView];
//将UI坐标转化为摄像头坐标
CGPoint cameraPoint = [self.captureVideoPreviewLayer captureDevicePointOfInterestForPoint:point];
point.y +=124;
[self setFocusCursorWithPoint:point];
[self focusWithMode:AVCaptureFocusModeAutoFocus exposureMode:AVCaptureExposureModeAutoExpose atPoint:cameraPoint];
}
- (void)clickTakeButton:(UIButton *)sender{
//根据设备输出获得连接
AVCaptureConnection *captureConnection=[self.captureStillImageOutput connectionWithMediaType:AVMediaTypeVideo];
//根据连接取得设备输出的数据
[self.captureStillImageOutput captureStillImageAsynchronouslyFromConnection:captureConnection completionHandler:^(CMSampleBufferRef imageDataSampleBuffer, NSError *error) {
if (imageDataSampleBuffer) {
NSData *imageData=[AVCaptureStillImageOutput jpegStillImageNSDataRepresentation:imageDataSampleBuffer];
UIImage *image=[UIImage imageWithData:imageData];
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
}
}];
}
// 打开闪关灯
- (void)clickFlashOnButton:(UIButton *)sender{
[self setFlashMode:AVCaptureFlashModeOn];
[self setFlashModeButtonStatus];
}
//关闭闪光灯
- (void)clickFlashOffButton:(UIButton *)sender{
[self setFlashMode:AVCaptureFlashModeOff];
[self setFlashModeButtonStatus];
}
//自动闪关灯开起
- (void)clickFlashAutoButton:(UIButton *)sender{
[self setFlashMode:AVCaptureFlashModeAuto];
[self setFlashModeButtonStatus];
}
//切换摄像头
- (void)clikcExchangeCamera:(UIButton *)sender{
AVCaptureDevice * currentDevice = [self.captureDeviceInput device];
AVCaptureDevicePosition currentPosition = [currentDevice position];
[self removeNotificationFromCaptureDevice:currentDevice];
AVCaptureDevice * toChangeDevice;
AVCaptureDevicePosition toChangePosition = AVCaptureDevicePositionFront;
if (currentPosition==AVCaptureDevicePositionUnspecified||currentPosition==AVCaptureDevicePositionFront) {
toChangePosition = AVCaptureDevicePositionBack;
}
toChangeDevice = [self getCameraDeviceWithPosition:toChangePosition];
[self addNotificationToCaptureDevice:toChangeDevice];
//获得要调整到设备输入对象
AVCaptureDeviceInput * toChangeDeviceInput = [[AVCaptureDeviceInput alloc]initWithDevice:toChangeDevice error:nil];
//改变会话到配置前一定要先开启配置，配置完成后提交配置改变
[self.captureSession beginConfiguration];
//移除原有输入对象
[self.captureSession removeInput:self.captureDeviceInput];
//添加新的输入对象
if ([self.captureSession canAddInput:toChangeDeviceInput]) {
[self.captureSession addInput:toChangeDeviceInput];
self.captureDeviceInput=toChangeDeviceInput;
}
//提交新的输入对象
[self.captureSession commitConfiguration];
[self setFlashModeButtonStatus];
}
- (void)clickVideoButton:(UIButton *)sender{
//根据设备输出获得连接
AVCaptureConnection *captureConnection=[self.captureMovieFileOutPut connectionWithMediaType:AVMediaTypeVideo];
//根据连接取得设备输出的数据
if (![self.captureMovieFileOutPut isRecording]) {
// self.enableRotation=NO;
//如果支持多任务则则开始多任务
if ([[UIDevice currentDevice] isMultitaskingSupported]) {
self.backgroundTaskIdentifier=[[UIApplication sharedApplication] beginBackgroundTaskWithExpirationHandler:nil];
}
//预览图层和视频方向保持一致
captureConnection.videoOrientation=[self.captureVideoPreviewLayer connection].videoOrientation;
NSString *outputFielPath=[NSTemporaryDirectory() stringByAppendingString:@"myMovie.mov"];
NSLog(@"save path is :%@",outputFielPath);
NSURL *fileUrl=[NSURL fileURLWithPath:outputFielPath];
[self.captureMovieFileOutPut startRecordingToOutputFileURL:fileUrl recordingDelegate:self];
}
else{
[self.captureMovieFileOutPut stopRecording];//停止录制
}
}
#pragma mark - UI相关和布局
- (void)setupUI{
[self.view addSubview:self.contentView];
self.contentView.frame = CGRectMake(0, 124, ScreenWith, ScreenHeight-60-124);
self.takeButton = [self createCustomButtonWithName:@"拍照"];
[self.takeButton addTarget:self action:@selector(clickTakeButton:) forControlEvents:UIControlEventTouchUpInside];
self.takeButton.frame = CGRectMake(ScreenWith/2-30, ScreenHeight-60, 60, 60);
[self.view addSubview:self.takeButton];
self.videoButton = [self createCustomButtonWithName:@"录像"];
[self.videoButton addTarget:self action:@selector(clickVideoButton:) forControlEvents:UIControlEventTouchUpInside];
self.videoButton.frame = CGRectMake(ScreenWith-80, ScreenHeight-60, 60, 60);
[self.view addSubview:self.videoButton];
CGFloat margin = ((ScreenWith - 4*60)/5);
self.flashOnButton = [self createCustomButtonWithName:@"打开闪光灯"];
[self.flashOnButton addTarget:self action:@selector(clickFlashOnButton:) forControlEvents:UIControlEventTouchUpInside];
self.flashOnButton.frame = CGRectMake(margin, 64, 60, 60);
[self.view addSubview:self.flashOnButton];
self.flashOffButton = [self createCustomButtonWithName:@"关闭闪光灯"];
[self.flashOffButton addTarget:self action:@selector(clickFlashOffButton:) forControlEvents:UIControlEventTouchUpInside];
self.flashOffButton.frame = CGRectMake(60+2*margin, 64, 60, 60);
[self.view addSubview:self.flashOffButton];
self.flashAutoButton = [self createCustomButtonWithName:@"自动闪光灯"];
[self.flashAutoButton addTarget:self action:@selector(clickFlashAutoButton:) forControlEvents:UIControlEventTouchUpInside];
self.flashAutoButton.frame = CGRectMake(2*60+3*margin, 64, 60, 60);
[self.view addSubview:self.flashAutoButton];
self.exchangeCamera = [self createCustomButtonWithName:@"切换"];
[self.exchangeCamera addTarget:self action:@selector(clikcExchangeCamera:) forControlEvents:UIControlEventTouchUpInside];
self.exchangeCamera.frame = CGRectMake(ScreenWith-60-margin, 64, 60, 60);
[self.view addSubview:self.exchangeCamera];
self.focusCursor = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 60, 60)];
self.focusCursor.backgroundColor = [UIColor redColor];
self.focusCursor.layer.cornerRadius = 30;
self.focusCursor.layer.masksToBounds = YES;
[self.view addSubview:self.focusCursor];
}
- (UIView *)contentView{
if (!_contentView) {
_contentView = [[UIView alloc] init];
}
return _contentView;
}
- (UIButton *)createCustomButtonWithName:(NSString *)name{
UIButton * button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setTitle:name forState:UIControlStateNormal];
button.backgroundColor = [UIColor redColor];
button.layer.cornerRadius = 30;
button.layer.masksToBounds = YES;
return button;
}
效果图
网友评论