UIImagePickerController 限制选择视频文件
25 Aug 2015#import <MobileCoreServices/MobileCoreServices.h>
UIImagePickerController *videoCapture = [[UIImagePickerController alloc] init];
NSArray *availableTypes = [UIImagePickerController availableMediaTypesForSourceType:UIImagePickerControllerSourceTypeCamera];
if ([availableTypes containsObject:(__bridge NSString *)kUTTypeMovie]) {
[videoCapture setMediaTypes:@[(__bridge NSString *)kUTTypeMovie)]];
}