iOS小记

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1.iOS切换使用http ：

<key>NSAppTransportSecurity</key>

<dict>

<key>NSAllowsArbitraryLoads</key>

<true/>

</dict>

2.图片布局设置

UIImage *pic = [ UIImage imageNamed:@"IMG_0404.PNG"];
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(20, 20, 240, 100 )];
[imageView setImage:pic];
[imageView setContentScaleFactor:[[UIScreen mainScreen] scale]]; //根据屏幕类别选择图片
imageView.contentMode = UIViewContentModeScaleAspectFill;
imageView.autoresizingMask = UIViewAutoresizingFlexibleHeight;
imageView.clipsToBounds = YES;

3.svn常用命令

http://www.cnblogs.com/newstar/archive/2011/01/04/svn.html

4,Search Bar 怎样去掉背景的颜色（storyboard里只能设置background颜色，可是发现clear Color无法使用）

其实在代码里还是可以设置的，那就是删除背景view

[[self.searchBar.subviews objectAtIndex:0] removeFromSuperview];

5.iOS8后本地通知设置

http://blog.csdn.net/woaifen3344/article/details/44302635

6.录音设置

```

recordSetting = [[NSMutableDictionary alloc]init];

//设置录音格式 AVFormatIDKey==kAudioFormatLinearPCM

[recordSetting setValue:[NSNumber numberWithInt:kAudioFormatMPEG4AAC] forKey:AVFormatIDKey];

//设置录音采样率(Hz) 如：AVSampleRateKey==8000/44100/96000（影响音频的质量）

[recordSetting setValue:[NSNumber numberWithFloat:44100] forKey:AVSampleRateKey];

//录音通道数 1 或 2

[recordSetting setValue:[NSNumber numberWithInt:1] forKey:AVNumberOfChannelsKey];

//线性采样位数 8、16、24、32

[recordSetting setValue:[NSNumber numberWithInt:16] forKey:AVLinearPCMBitDepthKey];

//录音的质量

[recordSetting setValue:[NSNumber numberWithInt:AVAudioQualityHigh] forKey:AVEncoderAudioQualityKey];

// recordSetting = [[NSDictionary alloc] initWithObjectsAndKeys:

// [NSNumber numberWithFloat: 44100.0],AVSampleRateKey, //采样率

// [NSNumber numberWithInt: kAudioFormatLinearPCM],AVFormatIDKey,

// [NSNumber numberWithInt:16],AVLinearPCMBitDepthKey,//采认16

// [NSNumber numberWithInt: 2], AVNumberOfChannelsKey,//通道的数目

// [NSNumber numberWithBool:NO],AVLinearPCMIsBigEndianKey,//大端还是小端是内存的组织方式

// [NSNumber numberWithBool:NO],AVLinearPCMIsFloatKey,nil];

// NSString *strUrl = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];

//recordedFile=[NSURL fileURLWithPath:[NSString stringWithFormat:@"%@/lll.aac", strUrl]];

recordedFile = [NSURL fileURLWithPath:[NSTemporaryDirectory() stringByAppendingPathComponent: [NSString stringWithFormat: @"%.0f.%@", [NSDatetimeIntervalSinceReferenceDate] * 1000.0, @"aac"]]]; //文件名的设置

// tmpFile = [NSURL fileURLWithPath:[NSTemporaryDirectory() stringByAppendingString:@"RecordedFile"]];

[[AVAudioSession sharedInstance] setCategory: AVAudioSessionCategoryPlayAndRecorderror: nil];

NSError *error = nil;

recorder = [[AVAudioRecorder alloc] initWithURL:recordedFilesettings:recordSetting error:&error];

if (recorder!= nil) {

recorder.delegate = self;

if ([recorder prepareToRecord] == YES&&[recorder record]==YES)

{

NSLog(@"录制声音开始！");

} else {

NSLog(@"录制失败！%@",error);

int errorCode = CFSwapInt32HostToBig ([error code]);

NSLog(@"Error: %@ [%4.4s])" , [error localizedDescription], (char*)&errorCode);

}

} else {

NSLog(@"auioRecorder实例创建失败！");

}

```

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