iOS NSString获取指定下标字符,NSString获取指定下标字符,NSString substringWithRange,NSString characterAtIndex,

iOS NSString 和 wchar_t 相互转换

Xcode - This app has attempted to access privacy-sensitive data without a usage description.

iOS NSNumber和int相互转换,iOS NSNumber和int,NSNumber和int相互转换,NSNumber和int转换,NSNumber和int,

Object-C UIImage 和 CVPixelBufferRef 相互转换 CVPixelBufferRef 转 UIImage UIImage 转 CVPixelBufferRef kCVPixelFormatType_OneComponent8 是单通道的黑白数据； kCVPixelFormatType_32ARG...

iOS NSString 创建和初始化 + (instancetype)string; + (instancetype)stringWithString:(NSString *)string; + (instancetype)stringWithCharacters:(const unichar *)characters length:(NSUI...

iOS NSValue和CMTimeRange转换,NSValue转CMTimeRange, CMTimeRange转NSValue,NSValue和CMTimeRange转换,猿说编程,

iOS NSString匹配字符串开头,NSString匹配字符串开头, hasPrefix,NSString hasPrefix,猿说编程,

Object-C isKindOfClass /* 判断是否为对象是否为ClassName或其子类的实例 */ - (BOOL)isKindOfClass:(Class)aClass;

iOS NSString查找指定字符串位置,iOS NSString查找指定字符串,NSString查找指定字符串,iOS NSString查找字符串,NSString查找字符串,