NSString *path = [[NSBundle mainBundle] pathForResource:@"资源名称" ofType:@"资源类型(后缀)"];
NSURL *url = [NSURL fileURLWithPath:path];
NSURL *url = [[NSBundle mainBundle] URLForResource:@"资源名称" withExtension:nil];
NSString *path = [[NSBundle mainBundle] pathForResource:@"资源名称" ofType:@"资源类型(后缀)"];
NSURL *url = [NSURL fileURLWithPath:path];
NSURL *url = [[NSBundle mainBundle] URLForResource:@"资源名称" withExtension:nil];